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• DKIMPROXY signing wrong domain

  - by user64566

  Just.... wont sign a thing... The dkimproxy_out.conf: # specify what address/port DKIMproxy should listen on listen 127.0.0.1:10028 # specify what address/port DKIMproxy forwards mail to relay 127.0.0.1:10029 # specify what domains DKIMproxy can sign for (comma-separated, no spaces) domain tinymagnet.com,hypnoenterprises.com # specify what signatures to add signature dkim(c=relaxed) signature domainkeys(c=nofws) # specify location of the private key keyfile /etc/postfix/dkim/private.key # specify the selector (i.e. the name of the key record put in DNS) selector mail The direct connection straight to the server, making it clear that this is a problem with dkimproxy and not postfix... mmxbass@hypno1:~$ telnet localhost 10028 Trying 127.0.0.1... Connected to localhost.localdomain. Escape character is '^]'. 220 hypno1.hypnoenterprises.com ESMTP Postfix (Debian/GNU) EHLO hypno1.hypnoenterprises.com 250-hypno1.hypnoenterprises.com 250-PIPELINING 250-SIZE 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN MAIL FROM:<[email protected]> 250 2.1.0 Ok RCPT TO:<[email protected]> 250 2.1.5 Ok DATA 354 End data with <CR><LF>.<CR><LF> SUBJECT:test . 250 2.0.0 Ok: queued as B62A78D94F QUIT 221 2.0.0 Bye Now lets look at the mail headers as reported by myiptest.com: From [email protected] Thu Dec 23 18:57:14 2010 Return-path: Envelope-to: [email protected] Delivery-date: Thu, 23 Dec 2010 18:57:14 +0000 Received: from [184.82.95.154] (helo=hypno1.hypnoenterprises.com) by myiptest.com with esmtp (Exim 4.69) (envelope-from ) id 1PVqLi-0004YR-5f for [email protected]; Thu, 23 Dec 2010 18:57:14 +0000 Received: from hypno1.hypnoenterprises.com (localhost.localdomain [127.0.0.1]) by hypno1.hypnoenterprises.com (Postfix) with ESMTP id 878418D902 for ; Thu, 23 Dec 2010 13:57:26 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha1; c=simple; d=hypnoenterprises.com; h= from:to:subject:date:mime-version:content-type :content-transfer-encoding:message-id; s=mail; bh=uoq1oCgLlTqpdD X/iUbLy7J1Wic=; b=HxBKTGjzTpZSZU8xkICtARCKxqriqZK+qHkY1U8qQlOw+S S1wlZxzTeDGIOgeiTviGDpcKWkLLTMlUvx8dY4FuT8K1/raO9nMC7xjG2uLayPX0 zLzm4Srs44jlfRQIjrQd9tNnp35Wkry6dHPv1u21WUvnDWaKARzGGHRLfAzW4= Received: from localhost (localhost.localdomain [127.0.0.1]) by hypno1.hypnoenterprises.com (Postfix) with ESMTP id 2A04A8D945 for ; Thu, 23 Dec 2010 13:57:26 -0500 (EST) X-Virus-Scanned: Debian amavisd-new at hypno1.hypnoenterprises.com Received: from hypno1.hypnoenterprises.com ([127.0.0.1]) by localhost (hypno1.hypnoenterprises.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ua7BnnzmIaUO for ; Thu, 23 Dec 2010 13:57:25 -0500 (EST) Received: from phoenix.localnet (c-76-23-245-211.hsd1.ma.comcast.net [76.23.245.211]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by hypno1.hypnoenterprises.com (Postfix) with ESMTPSA id 48A0D8D90D for ; Thu, 23 Dec 2010 13:57:25 -0500 (EST) From: Joshua Pech To: [email protected] Subject: test Date: Thu, 23 Dec 2010 13:57:25 -0500 User-Agent: KMail/1.13.5 (Linux/2.6.32-5-amd64; KDE/4.4.5; x86_64; ; ) MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: DomainKey-Status: no signature Received-SPF: pass (myiptest.com: domain of tinymagnet.com designates 184.82.95.154 as permitted sender) Notice how the dkim signature specifies the d=hypnoenterprises.com.... why?

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• Zimbra ZCS 7.2.1 MTA Deferring e-mail

  - by user139181

  Zimbra 7.1.2 and the MTA seems to be deferring e-mail when it is received. Oct 1 09:35:42 www postfix/error[16614]: 5FB8C1A803EE: to=<[email protected]>, relay=none, delay=0.15, delays=0.08/0.01/0/0.06, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to thedigiologygroup.org[75.149.56.27]:7025: Connection timed out) I can telnet to both 25 and 7025. I do get a $ telnet thedigiologygroup.org 25 Trying 75.149.56.27... Connected to thedigiologygroup.org. Escape character is '^]'. 220 thedigiologygroup.org ESMTP Postfix 500 5.5.2 Error: bad syntax 500 5.5.2 Error: bad syntax` I dont see email in the inbox obviously and I am not sure how to troubleshoot what is going on. Nothing DNS has changed. This box has been running for a year Zimbra was removed and re-installed after trying to upgrade to ZCS-8 with no luck.

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• E-mail sent with postfix are marked as spam.

  - by unkown

  I am using gmail as my email provider, and I only have gmail servers for my mx records. I don't like the 500 message per day cap. To address this issue I would like to run postfix on my Linux machine to only send email, incoming port 25 blocked by my firewall. I can send email, however google marks all messages sent with postfix as SPAM. How do I make sure that people know email sent with postfix is valid?

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• Server and Application architecture for large outgoing email volume.

  - by Ezequiel

  Hi, we need to develop an application to send large amount of emails (newsletters) We estimate 15 millions of emails per month (6 - 10 emails per seconds). Would you recommend me the proper architecture for this application? should we have several MTA agents and use them in a round robin fashion? What considerations should we take on account to not being treated as spammers (its really not spam what we are going to send). Thanks for your help. Ezequiel

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• postfix and iRedMail- Relaying Denied

  - by Lock

  I am trying to setup iRedMail and am way over my head here. I have installed it, and can send emails internally, but not externally. When I send an email from outside, I get the following return email: The error that the other server returned was: 550 550 5.7.1 <[email protected]>... Relaying denied (state 13). Now I have no idea where to start looking! Any ideas? I have really only just installed iRedMail so I am unsure what else I need to do to get it working. I've pointed my MX records to that server, so that shouldnt be the problem. Also- if i stop postfix (so nothing is listening on port 25) and send a test email, I get the same reply back. Why would I get the same reply back even if postfix is stopped? I have run tcpdump over 25 and can see the packets coming in/out, so its definitely a configuration issue! I suppose my question is not really "what is my problem", but more "What configuration needs to be completed on postfix and iRedMail?"

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• Postfix mailq - send every x minutes

  - by Mike

  I got about 2000 clients on my website that have subscribed to our mailing list. I've used in the past Swift Mailer but it didn't work the way it was supposed to. I'm wondering if there is a way that Postfix could keep emails on the mailq (if lots of emails are sent at the same time) and send chunks of 20-30 emails every 10-20 mins. So this way, our server is not blacklisted. Any suggestions will be appreciate it.

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• PTR Record Troubles

  - by Physikal

  I am having a hell of a time getting our PTR record right. Our current PTR zone looks like this: $ttl 38400 @ IN SOA ns1.domain.com. admin.domain.com. ( 1268669139 10800 3600 604800 38400 ) xxx.xxx.xxx.in-addr.arpa. IN NS ns2.domain.com. xxx.xxx.xxx.in-addr.arpa. IN NS ns1.domain.com. 97 IN PTR mail.domain.com. xxx.xxx.xxx.xxx.in-addr.arpa. IN PTR mail.domain.com. 97.96/28. IN PTR mail.domain.com For some reason the only thing that works is the 97.96/28. When this line is in there it actually says I have a PTR record when reporting from intodns.com. If I remove that line, it says I have no PTR. I have followed instructions from http://www.philchen.com/2007/04/04/configuring-reverse-dns and when I follow those instructions intodns.com says I have no PTR. When it does work with the line 97.96/28., the PTR kicks back as (from intodns.com) : 97.xxx.xxx.xxx.in-addr.arpa -> mail.domain.com.xxx.xxx.xxx.in-addr.arpa Which is, to my knowledge, an incorrect PTR. I want it to just kick back as mail.domain.com, without the xxx.xxx.xxx.in-addr.arpa extension. I have tried everything I can think of but I can't fix it. I can't help but think it's one of those things that is so stupid and simple I'm going to do the ol'facepalm. Any help is greatly appreciated. Thanks! In the event that the domain zone is needed, here it is: $ttl 38400 @ IN SOA domain.com. [email protected]. ( 1265221037 10800 3600 604800 38400 ) domain.com. IN A xxx.xxx.xxx.xxx www.domain.com. IN A xxx.xxx.xxx.xxx ftp.domain.com. IN A xxx.xxx.xxx.xxx m.domain.com. IN A xxx.xxx.xxx.xxx localhost.domain.com. IN A 127.0.0.1 webmail.domain.com. IN A xxx.xxx.xxx.xxx admin.domain.com. IN A xxx.xxx.xxx.xxx mail.domain.com. IN A xxx.xxx.xxx.xxx domain.com. IN MX 5 mail.domain.com. domain.com. IN TXT "v=spf1 a mx a:domain.com ip4:xxx.xxx.xxx.xxx ?all" domain.com. IN NS ns1 domain.com. IN NS ns2 ns1 IN A xxx.xxx.xxx.xxx ns2 IN A xxx.xxx.xxx.xxx Any double entries in different formats were part of my troubleshooting process.

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• How to prevent remote hosts from delivering mail to Postfix with spoofed From header?

  - by Hongli Lai

  I have a host, let's call it foo.com, on which I'm running Postfix on Debian. Postfix is currently configured to do these things: All mail with @foo.com as recipient is handled by this Postfix server. It forwards all such mail to my Gmail account. The firewall thus allows port 25. All mail with another domain as recipient is rejected. SPF records have been set up for the foo.com domain, saying that foo.com is the sole origin of all mail from @foo.com. Applications running on foo.com can connect to localhost:25 to deliver mail, with [email protected] as sender. However I recently noticed that some spammers are able to send spam to me while passing the SPF checks. Upon further inspection, it looks like they connect to my Postfix server and then say HELO bar.com MAIL FROM:<[email protected]> <---- this! RCPT TO:<[email protected]> DATA From: "Buy Viagra" <[email protected]> <--- and this! ... How do I prevent this? I only want applications running on localhost to be able to say MAIL FROM:<[email protected]>. Here's my current config (main.cf): https://gist.github.com/1283647

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• Exim4 Smart Host Relay

  - by ColinM

  I am running Exim 4.71. I want to: Route all email from A.com through mail.A.com Route all email from [B-E].com through mail.B.com Send all other email directly. Here is the configuration I have that doesn't work like I hoped: domainlist a_domains = a.com domainlist b_domains = b.com : c.com : d.com : e.com begin routers smart_route_a: driver = manualroute domains = +a_domains transport = remote_smtp route_list = +a_domains mail.a.com no_more smart_route_b: driver = manualroute domains = +b_domains transport = remote_smtp route_list = +b_domains mail.mollenhour.com no_more dnslookup: driver = dnslookup domains = ! +local_domains transport = remote_smtp ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 no_more When I send an email e.g. with PHP's mail() or Zend_Mail_Transport_Smtp setting both From: and Return-Path: as [email protected], the smart_route_a router is not used, the dnslookup is used instead. Disabling dnslookup results in no mail being sent. From the logs it appears that email sent to [email protected] uses smart_route_a, but the same email sent from [email protected] to [email protected] is sent using dnslookup. How do I make email from [email protected] be relayed via mail.a.com?

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• Difference between BSMTP and and simply forwarding an MX-record?

  - by Aron Rotteveel

  I am trying to understand the benefits of BSMTP, but must admit I do not quite understand the concept of it. What are the main differences between BSMTP and simply forwarding an MX-record? What is the difference between BSMTP and having a fallback MX? Are there any downsides to using BSMTP? Hopefully you can clear this up for me. Thanks in advance!

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• Is null return path reliable indication of a bounce?

  - by Vasiliy Faronov

  I have a mailbox that receives bounces as well as normal email (the latter includes messages from automated services). I want to filter out the bounces and forward them to another mailbox. Assume I cannot change the envelope return path in email I send. Is “null return path” a reliable criterion to tell bounces from normal mail? Roughly how many false positives and false negatives can I expect if I apply it?

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• DKIM on postfix relay server

  - by Danijel Krmar

  I have a postfix/amavis relay server, with the domain name mail.example.com. It will be a relay for dozens of VPSs, which will have domains like hostname.example.net. So i have actually two questions. Is it possible to dkim sing the mails originating from the VPSs over the postfix relay on the relay server? Or have the mails to be signed on the VPSs where they are actually from? Would a amavis configuration like this be ok? # DKIM key dkim_key('example.com', 'dkim', '/var/dkim/DKIMkey.pem'); # Cover subdomains in @dkim_signature_options_bysender_maps= (): @dkim_signature_options_bysender_maps = ( { # Cover subdomains example.net. '.example.net' => { d => 'example.com' }, }); Or have I misunderstood the whole concept. Do I even need to sign subdomains if they are going over an relay server, or is it enough to just sign the relay server domain?

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• Postfix - Block email from non-existent local addresses

  - by Kelso.b

  My question is very similar to this one, but for postfix. We keep getting emails from addresses like "[email protected]" delivered to other "@ourdomain.com" addresses. From my google research, I understand it might not be practical to verify the email originated from our IP or VPN (Although this would be ideal, so if you can think of a way to do this, let me know), but in most of these cases the sender address (ex. "accounting") is not a valid account. I imagine there must be a way to make sure that a local account exists before delivering the message.

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• World's simplest, LIGHTEST email client?

  - by rekindleMyLoveOf

  I do not want the bloat that is outlook, nor do I need exchange server-like nifty features. Most certainly do not want the bloat that is thunderbird. I just want to be able to send and receive email as/with the particular email account I set up on my domain. Pocomail sounded like a nice idea but apparently it does not deal with html and since this is for a tiny fledgling biz, i think I might need to accomodate html... so I didn't investigate further. Too bad gmail won't let me send from my own mail server, really. :o) What do you guys use that simple and nifty? ===edit=== forgot to mention this is going to be on Windows Vista. (Hey, I'm not a "superuser", okay? I got bounced from stackoverflow :-) )

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• Capture Outgoing Email to One Mailbox or Account on Linux

  - by futureal

  I am looking to see if anything exists that would allow us to capture all outgoing email on a machine -- for example, in a staging environment -- and drop it in a single place, which ideally would be something we could check with a mail client. Currently we're doing this on the software level (if environment is staging, rewrite address) which is a bit ugly and leads to errors. The servers are currently on Debian Linux, using exim as the mail transport. Open to any and all suggestions!

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• Things to check for an internet-facing email server.

  - by Shtééf

  I'm faced with the task of setting up a public-internet-facing email server, that will be relaying mail for all of our other servers in the network. While the software in itself is set up in few keystrokes, what little experience I have with managing an email server has thought me that there are tons of awkward filtering techniques employed by other email systems. Systems that my own server will inevitably interact with a some point. Hence, my questions: What things should be kept in mind and double checked when setting up an email server? What resources are available for checking if my email server is set-up correctly? I'm specifically NOT looking for instructions for any given mail server, such as Exchange or Postfix. But it's okay to say: “you should have X and Y in your set-up, because when talking to server software Z, it typically tries to weed out open relays by checking for these.” Some things I've discovered myself: Make sure forward and reverse DNS are set up. Mail servers tend to do a reverse lookup for the peer IP-address when receiving. Matching a reverse look up with a follow-up forward lookup is probably employed to weed out open relays run through malware on home networks. Make sure the user in the From-address exists. The From-address is easily spoofed. A receiving mail server may try to contact the mail server in the From-domain, and see if the From-user actually exists.

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• Using AWS SES with Sendmail

  - by Abs

  I am trying to send mail via AWS SES uisng Sendmail. I have Sendmail version 8.14.4 installed and I followed the first section of this useful tutorial by Amazon. However, I get this: root@:/etc/mail# echo "Subject: test" | sendmail -v [email protected] [email protected]... Connecting to [127.0.0.1] via relay... [email protected]... Deferred: Connection timed out with [127.0.0.1] Can anyone help me get this working? The logs have the following: Dec 14 10:35:21 ip-10-xx-xx-181 sm-msp-queue[17910]: qBE8K1Lu016411: to=root, delay=00:21:24, xdelay=00:06:19, mailer=relay, pri=121806, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection timed out with [127.0.0.1]

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• Custom Transport Agent: How do I collect NDRs and all other undeliverables in Exchange 2010 from the Postmaster?

  - by makerofthings7

  I'm trying to collect all NDRs in a single mailbox for all invalid recipients, and anything that fails for any reason. I have a custom transport agent, that I've written myself that appears here: [PS] C:\Windows\system32>Get-TransportAgent Identity Enabled Priority -------- ------- -------- Transport Rule Agent True 1 Text Messaging Routing Agent True 2 Text Messaging Delivery Agent True 3 Routing Rule Agent True 4 **** Sometimes when I run get-messagetrackinglog I get failures like this below RunspaceId : 4ecc61fb-13b9-4506-b680-577222c9bf21 Timestamp : 10/14/2013 12:42:42 PM ClientIp : ClientHostname : Exchange1 ServerIp : ServerHostname : SourceContext : Routing Rule Agent ConnectorId : Source : AGENT EventId : FAIL InternalMessageId : 4416 MessageId : <[email protected]> Recipients : {[email protected]} RecipientStatus : {} TotalBytes : 4542 RecipientCount : 1 RelatedRecipientAddress : Reference : MessageSubject : review CGRC due diligence. Sender : [email protected] ReturnPath : [email protected] MessageInfo : MessageLatency : MessageLatencyType : None EventData : How can I collect the NDRs in a single mailbox for review? I have already set the following command but it is of no effect [PS] C:\>set-TransportConfig -JournalingReportNdrTo [email protected] -ExternalPostmasterAddress [email protected]

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• Colud not open connection to the host error in telnet

  - by hima

  I need to send email from my asp.net application.For that I am using telnet tk2smtp.msn.com 25 command from the command prompt to connect to the specific port on tk2smtp but its showing Could not open connection to the host error in command prompt. I installed Telnet Client in my machine . Let me know if there are any other things to be configured for this Thanks, Hima.

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• Different Servers for incoming mails

  - by André

  Hi everybody, not sure if what I want is possible so I´d appreciate any pointers. I have full control over the infrastructure (DNS and servers) Currently I receive mails for domain.tld. MX record for domain.tld is gw.domain.tld. gw then does some spam and virus checking and forwards the mails to the internal exchange server. GW is a Proxmox Mail Gateway Box (Free license) Now what I want is to distribute mails for different recipients to other mail servers. Basicly I only want [email protected] and [email protected] to go to the exchange as before, but all others go to a different mail server (based on linux). Any idea how I could achieve this?

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• Postfix: mail going to spam

  - by Yaro

  All emails I send from my new server go to spam in Gmail (and sometimes yahoo). I've never before sent out mass email or spam. What I've already done: Configured reverse DNS Enabled DKIM Verified my IP is not on spam lists Verified I'm not an open relay Here are the headers from the received message: http://pastie.org/pastes/8450781/text?key=onxgrau1xinyqv7ridxrea Really, can't seem to figure out why the mail just doesn't come through. I'd really appreciate your help. Thank you!

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• Log with iptalbes which user is delivering email to port 25

  - by Maus

  Because we got blacklisted on CBL I set up the following firewall rules with iptables: #!/bin/bash iptables -A OUTPUT -d 127.0.0.1 -p tcp -m tcp --dport 25 -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --gid-owner mail -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --uid-owner root -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --uid-owner Debian-exim -j ACCEPT iptables -A OUTPUT -p tcp -m limit --limit 15/minute -m tcp --dport 25 -j LOG --log-prefix "LOCAL_DROPPED_SPAM" iptables -A OUTPUT -p tcp -m tcp --dport 25 -j REJECT --reject-with icmp-port-unreachable I'm not able to connect to port 25 from localhost with another user than root or a mail group member - So it seems to work. Still some questions remain: How effective do you rate this rule-set to prevent spam coming from bad PHP-Scripts hosted on the server? Is there a way to block port 25 and 587 within the same statement? Is the usage of /usr/sbin/sendmail also limited or blocked by this rule-set? Is there a way to log the username of all other attempts which try to deliver stuff to port 25?

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• Something is spamming from my hMail server - how can I deal with this?

  - by joshcomley

  My Windows 2008 server is attempting to send out a lot of spam, I've just discovered, and I'm not sure how to see where the compromise is. For example: has someone hacked an account? Has someone hacked the server? Is there a virus on the server? What can I do to investigate this? Edit Thanks for the replies so far. I am running hMail server, and have spent so long investigating the correct configuration but still I end up with these emails being sent. Here is a screenshot of my Internet IP range settings on the server: (let me know what else I can provide to help)

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• unknown reciever Esmtp

  - by Morteza Soltanabadiyan

  I found this in my log server: sm-mta[11410]: r9BKb6YY021119: to=<[email protected]>, ctladdr=<[email protected]> (33/33), delay=2+07:24:18, xdelay=00:00:01, mailer=esmtp, pri=29911032, relay=mail1.mkuku.com. [58.22.50.83], dsn=4.0.0, stat=Deferred: Connection refused by mail1.mkuku.com. This message is repeated every 10-30 seconds with a different "to" address. What is this? Is my server being used to send spam?

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• SBS 2008 R2: Did something change with anonymous relays?

  - by gravyface

  Have noticed that prior documentation on setting up anonymous relays in SBS 2008 no longer work without some additional configuration. Used to be able to follow this documentation, which is basically: setup a new receive connector add the IP address(es) that will be permitted to relay check off "anonymous" under Permission Group and then run the Exchange shell script to grant permissions. Now what seems to be happening is that if the permitted IP address happens to fall within the same address space as another more restrictive Receive Connector (like the "Default SBS08" one) and possibly if it's ahead of the new Receive Connector alphabetically (haven't tested that yet), the relay attempt fails with "Client Was Not Authenticated" error. To get it to work, I had to modify the scope of the "Default SBS08" Receive Connector to exclude the one LAN IP that I wanted to allow relaying for. I can't recall ever having to do this for Exchange 2007 Standard and/or any other SBS 2008 servers I've setup over the last couple of years and I don't remember doing this and the wiki entry I added at the office doesn't mention it either. So my question is, has anyone else experienced this? Has there been a new change with R2 or perhaps an Exchange Service Pack?

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