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  • cPanel's SMTP or google hosted SMTP ?

    - by praveen
    Hi, I'm wondering what mail servers I should use for sending mail through my website, avoiding them sent as spam. Hostgator SMTP google hosted SMTP I found that to avoid a mail sent as spam it should have the same host in "From:" and "Received". How to overcome this? Thanks

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  • Simple way to do SURBL lookup from Java?

    - by StaxMan
    I am reading about SURBLs (known spam hosts), for purpose of classifying spam, as a batch process. Main access method seems to be via DNS lookups. I was wondering what's the usual way to do such lookups from Java code. Since this is a batch process with no strict performance requirements, I think most important feature would just be simplicity.

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  • Use your own domain email and tired of SPAM? SPAMfighter FTW

    - by Dave Campbell
    I wouldn't post this if I hadn't tried it... and I paid for it myself, so don't anybody be thinking I'm reviewing something someone sent me! Long ago and far away I got very tired of local ISPs and 2nd phone lines and took the plunge and got hooked up to cable... yeah I know the 2nd phone line concept may be hard for everyone to understand, but that's how it was in 'the old days'. To avoid having to change email addresses all the time, I decided to buy a domain name, get minimal hosting, and use that for all email into the house. That way if I changed providers, all the email addresses wouldn't have to change. Of course, about a dozen domains later, I have LOTS of pop email addresses and even an exchange address to my client's server... times have changed. What also has changed is the fact that we get SPAM... 'back in the day' when I was a beta tester for the first ISP in Phoenix, someone tried sending an ad to all of us, and what he got in return for his trouble was a bunch of core dumps that locked up his email... if you don't know what a core dump is, ask your grandfather. But in today's world, we're all much more civilized than that, and as with many things, the criminals seem to have much more rights than we do, so we get inundated with email offering all sorts of wild schemes that you'd have to be brain-dead to accept, but yet... if people weren't accepting them, they'd stop sending them. I keep hoping that survival of the smartest would weed out the mental midgets that respond and then the jumk email stop, but that hasn't happened yet anymore than finding high-quality hearing aids at the checkout line of Safeway because of all the dimwits playing music too loud inside their car... but that's another whole topic and I digress. So what's the solution for all the spam? And I mean *all*... on that old personal email address, I am now getting over 150 spam messages a day! Yes I know that's why God invented the delete key, but I took it on as a challenge, and it's a matter of principle... why should I switch email addresses, or convert from [email protected] to something else, or have all my email filtered through some service just because some A-Hole somewhere has a site up trying to phish Ma & Pa Kettle (ask your grandfather about that too) out of their retirement money? Well... I got an email from my cousin the other day while I was writing yet another email rule, and there was a banner on the bottom of his email that said he was protected by SPAMfighter. SPAMfighter huh.... so I took a look at their site, and found yet one more of the supposed tools to help us. But... I read that they're a Microsoft Gold Partner... and that doesn't come lightly... so I took a gamble and here's what I found: I installed it, and had to do a couple things: 1) SPAMfighter stuffed the SPAMfighter folder into my client's exchange address... I deleted it, made a new SPAMfighter folder where I wanted it to go, then in the SPAMfighter Clients settings for Outlook, I told it to put all spam there. 2) It didn't seem to be doing anything. There's a ribbon button that you can select "Block", and I did that, wondering if I was 'training' it, but it wasn't picking up duplicates 3) I sent email to support, and wrote a post on the forum (not to self: reply to that post). By the time the folks from the home office responded, it was the next day, and first up, SPAMfighter knocked down everything that came through when Outlook opend... two thumbs up! I disabled my 'garbage collection' rule from Outlook, and told Outlook not to use the junk folder thinking it was interfering. 4) Day 2 seemed to go about like Day 1... but I hung in there. 5) Day 3 is now a whole new day... I had left Outlook open and hadn't looked at the PC since sometime late yesterday afternoon, and when I looked this morning, *every bit* of spam was in the SPAMfighter folder!! I'm a new paying customer After watching SPAMfighter work this morning, I've purchased a 1-year license, and I now can sit and watch as emails come in and disappear from my inbox into the SPAMfighter folder. No more continual tweaking of the rules. I've got SPAMfighter set to 'Very Hard' filtering... personally I'd rather pull the few real emails out of the SPAMfighter folder than pull spam out of the real folders. Yes this is simply another way of using the delete key, but you know what? ... it feels good :) Here's a screenshot of the stats after just about 48 hours of being onboard: Note that all the ones blocked by me were during Day 1 and 2... I've blocked none today, and everything is blocked. Stay in the 'Light!

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  • Has this server been compromised?

    - by Griffo
    A friend is running a VPS (CentOS) His business partner was the sysadmin but has left him high and dry to look after the system. So, I've been asked to help out in fixing an apparent spam problem. His IP address got blacklisted for unsolicited mail. I'm not sure where to look for a problem, but I started with netstat to see what open connections were running. It looks to me like he has remote hosts connected to his SMTP server. Here's the output: Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 78.153.208.195:imap 86-40-60-183-dynamic.:10029 ESTABLISHED tcp 0 0 78.153.208.195:imap 86-40-60-183-dynamic.:10010 ESTABLISHED tcp 0 1 78.153.208.195:35563 news.avanport.pt:smtp SYN_SENT tcp 0 0 78.153.208.195:35559 vip-us-br-mx.terra.com:smtp TIME_WAIT tcp 0 0 78.153.208.195:35560 vip-us-br-mx.terra.com:smtp TIME_WAIT tcp 1 1 78.153.208.195:imaps 86-40-60-183-dynamic.:11647 CLOSING tcp 1 1 78.153.208.195:imaps 86-40-60-183-dynamic.:11645 CLOSING tcp 0 0 78.153.208.195:35562 mx.a.locaweb.com.br:smtp TIME_WAIT tcp 0 0 78.153.208.195:35561 mx.a.locaweb.com.br:smtp TIME_WAIT tcp 0 0 78.153.208.195:imap 86-41-8-64-dynamic.b-:49446 ESTABLISHED Does this indicate that his server may be acting as an open relay? Mail should only be outgoing from localhost. Apologies for my lack of knowledge but I don't work on linux in my day job. EDIT: Here's some output from /var/log/maillog which looks like it may be the result of spam. If it appears to be the case to others, where should I look next to investigate a root cause? I put the server IP through www.checkor.com and it came back clean. Jun 29 00:02:13 vps-1001108-595 qmail: 1309302133.721674 status: local 0/10 remote 9/20 Jun 29 00:02:13 vps-1001108-595 qmail: 1309302133.886182 delivery 74116: deferral: 200.147.36.15_does_not_like_recipient./Remote_host_said:_450_4.7.1_Client_host_rejected:_cannot_find_your_hostname,_[78.153.208.195]/Giving_up_on_200.147.36.15./ Jun 29 00:02:13 vps-1001108-595 qmail: 1309302133.886255 status: local 0/10 remote 8/20 Jun 29 00:02:13 vps-1001108-595 qmail: 1309302133.898266 delivery 74115: deferral: 187.31.0.11_does_not_like_recipient./Remote_host_said:_450_4.7.1_Client_host_rejected:_cannot_find_your_hostname,_[78.153.208.195]/Giving_up_on_187.31.0.11./ Jun 29 00:02:13 vps-1001108-595 qmail: 1309302133.898327 status: local 0/10 remote 7/20 Jun 29 00:02:14 vps-1001108-595 qmail: 1309302134.137833 delivery 74111: deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/ Jun 29 00:02:14 vps-1001108-595 qmail: 1309302134.137914 status: local 0/10 remote 6/20 Jun 29 00:02:19 vps-1001108-595 qmail: 1309302139.903536 delivery 74000: failure: 209.85.143.27_failed_after_I_sent_the_message./Remote_host_said:_550-5.7.1_[78.153.208.195_______1]_Our_system_has_detected_an_unusual_rate_of/550-5.7.1_unsolicited_mail_originating_from_your_IP_address._To_protect_our/550-5.7.1_users_from_spam,_mail_sent_from_your_IP_address_has_been_blocked./550-5.7.1_Please_visit_http://www.google.com/mail/help/bulk_mail.html_to_review/550_5.7.1_our_Bulk_Email_Senders_Guidelines._e25si1385223wes.137/ Jun 29 00:02:19 vps-1001108-595 qmail: 1309302139.903606 status: local 0/10 remote 5/20 Jun 29 00:02:19 vps-1001108-595 qmail-queue-handlers[15501]: Handlers Filter before-queue for qmail started ... EDIT #2 Here's the output of netstat -p with the imap and imaps lines removed. I also removed my own ssh session Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 1 78.153.208.195:40076 any-in-2015.1e100.net:smtp SYN_SENT 24096/qmail-remote. tcp 0 1 78.153.208.195:40077 any-in-2015.1e100.net:smtp SYN_SENT 24097/qmail-remote. udp 0 0 78.153.208.195:48515 125.64.11.158:4225 ESTABLISHED 20435/httpd

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  • How to protect my VPS from winlogon RDP spam requests

    - by Valentin Kuzub
    I got some hackers constantly hitting my RDP and generating thousands of audit failures in event log. Password is pretty elaborate so I dont think bruteforcing will get them anywhere. I am using VPS and I am pretty much a noob in Windows Server security (am a programmer myself and its my webserver for my site). Which is a recommended approach to deal with this? I would rather block IPs after some amount of failures for example. Sorry if question is not appropriate.

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  • Minimize the chance my email is blocked/filtered as spam

    - by justSteve
    I'm running a web-based store where order confirmations are sometimes blocked and don't reach the intended user. The structure of the business model is such that our product is marketed to the end-user by a 3rd parities - affiliates how are known entities to the end-users and email is freely exchanged between end-users and our affiliates. Our confirmations being blocked is becoming a big enough problem that we are considering implementing a system where a 'confirmations' address is created within the affiliates domain, then we'd have our app send via the affiliate's mail server instead of our own. But that'd be lots of work. The idea has been raised to have our app use our affiliates' email in the FROM field but still send from our server. My thinking is that would be detected at the end-users side and blocked just as often - we dealing with institutions large enough at least some checks up at the perimeter. Is this assumption correct (more likely to be blocked) or is there a less round about way to send messages under the auspices of 3rd parties? thx

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  • Bypass spam check for Auth users in postfix

    - by magiza83
    I would like to know if there is any option to "FILTER" auth users in postfix. Let me explain me better, I have the amavis and dspam services between postfix(25) and postfix(10026) but I would like to avoid this check if the users are authenticated. postfix(25)->policyd(10031)->amavis(10024)->postfix(10025)->dspam(dspam.sock)->postfix(10026)--->cyrus | /|\ |________auth users______________________________________________________________| my conf is: main.cf ... smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_sasl_path = smtpd smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination, check_policy_service inet:127.0.0.1:10040, reject_invalid_hostname, reject_rbl_client multi.uribl.com, reject_rbl_client dsn.rfc-ignorant.org, reject_rbl_client dul.dnsbl.sorbs.net, reject_rbl_client list.dsbl.org, reject_rbl_client sbl-xbl.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, reject_rbl_client ix.dnsbl.manitu.net, reject_rbl_client combined.rbl.msrbl.net, reject_rbl_client rabl.nuclearelephant.com, check_policy_service inet:127.0.0.1:10031, permit_mynetworks, reject ... I would like something like "FILTER smtp:localhost:10026" in case they are authenticated, because in my actual configuration i'm only avoiding policyd, but not amavis and dspam. Thanks.

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  • Spam in the VS2010 Extension Manager

    - by Alex DeLarge
    What's with all the spam (free trials and so on from Component Source & Telerik among others) in the VS 2010 Extensions Manager. Without going to the website there is no way to know whether a listing is free or trialware so, for me, the entire user experience of the Extensions Manager is ruined. Anyone else finding this? Is there a way of suppressing these? Alex...

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  • Custom Filter in cPanel to Auto-Delete Emails with Russian Characters

    - by John Conde
    I get a lot of spam to my email account from Russia. The emails themselves (name, subject, body) are in Russian and I was hoping to create a custom filter in cPanel (not in SpamAssassin but in cPanel itself) to catch these emails and delete them before they hit my inbox. I've tried setting up rules to flag emails with these characters but they still are getting through. This leads me to believe that there is an encoding issue at play here. Unfortunately I do not know how to overcome this. Ideas?

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  • Sending single emails works, but sending to the same email in a distribution list is bounced

    - by EvilChookie
    I'm running an Exchange 2003 server on a Telstra Business internet connection (in Australia). I'm routing emails through the SMTP connecter, using the host smtp.telstrabusiness.com When users send single emails to a single recipient, the emails are sent correctly. However, when users send emails to a distribution list, they bounce back with: The message could not be delivered because the recipient's destination email system is unknown or invalid. Please check the address and try again, or contact your system administrator to verify connectivity to the email system of the recipient. One of the people in the list was able to recieve a single email from us just a few minutes afterwards, but did not recieve any of the email that should have come from the distribution list. Is there a way I can throttle the number of messages that Exchange will send at a time, so as not to appear as spam to Telstra?

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  • McAfee Secure Messaging Service / Postini: false positive?

    - by Martin
    Hello, I'm puzzled by this email message that gets quarantined by McAfee Secure Messaging Service (it's based on Postini) for no reason that I can think of. Here are the Postini headers: X-pstn-2strike: clear X-pstn-neptune: 0/0/0.00/0 X-pstn-levels: (S: 0.02932/98.63596 CV:99.9000 FC:95.5390 LC:95.5390 R:95.9108 P:95.9108 M:97.0282 C:98.6951 ) X-pstn-settings: 3 (1.0000:1.0000) s cv gt3 gt2 gt1 r p m c X-pstn-addresses: from [db-null] X-pstn-disposition: quarantine I read the docs (http://www.mcafee-sms.com/webdocs/admin%5Fee%5Fmcafee/wwhelp/wwhimpl/common/html/wwhelp.htm?context=MACAFFHelp&file=header%5Foverview.html#951634) and in short, the x-pstn-settings header tells me that NONE of the filters was triggered, but the x-pstn-levels header tells me that the final score (0.02932) is low enough to classify the email as bulk/spam. Can anyone explain to me why the final score is so low when none of the filters were triggered? Does anyone have any suggestions on how to prevent this from happening? Regards, Martin

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  • Blacklisting: IP's or domains?

    - by johnnietheblack
    I am implementing a blacklisting system on my website that monitors contact forms for suspicious usage (both spam content and excessive frequency). When I find somebody / robot that meets my criteria for blacklisting, I want to send them to my DB as a blacklisted entity. My question is, should I blacklist them as an IP or as a domain? As far as I can see, blacklisting an IP is going to be far more effective, because I allow people to enter their email address in the form, and they can easily just change their domain on a regular basis. However, the downside is that if I blacklist an IP, I could potentially be blacklisting a large group of people who share an IP, when only one person is bad (ie - college campuses, coffee shops, etc). Is there a solution I'm missing?

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  • Training Exchange junk filter via OS X Mail.app

    - by Doug Harris
    My company uses Exchange 2007 for our mail server (via 3rd party hosted service), I use OS X Mail.app on my MacBook Pro. When viewing my junk folder in the webmail interface, there's a "Not Junk" button which will move the email out of the Junk folder. I can mimic the basic functionality in Mail.app by dragging the message from the junk folder to another folder. But... does this train the server? Specific questions: Does pressing the "Not Junk" button in the webmail interface (or Outlook) do anything more on the server side? Does Exchange used any sort of statistical spam filtering (e.g. bayesian filtering) based on this action? If the answer to #1 is yes, does moving the folder out of the junk folder in Mail.app trigger the statistical learning? If the answer to #2 is no, is there a different way to trigger the learning?

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  • sendmail is using return-path instead of from address

    - by magd1
    I have a customer that is complaining about emails marked as spam. I'm looking at the header. It shows the correct From: [email protected] However, it doesn't like the return-path. Return-Path: <[email protected]> Received-SPF: neutral (google.com: x.x.x.x is neither permitted nor denied by domain of [email protected]) client-ip=x.x.x.x; Authentication-Results: mx.google.com; spf=neutral (google.com: x.x.x.x is neither permitted nor denied by domain of [email protected]) [email protected] How do I configure sendmail to use the From address for the Return-Path?

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  • How can I find a computer on my network that is doing mass mailings?

    - by Alex Ciarlill
    I was notified by my isp that one of my machines is sending out spam. This happened about 3 months ago on windows machine running cygwin that was hacked due to an SSH vuln. The hackers setup IIS and SMTP. I cleared out the machine and all the services are disabled so I think that machine is okay I am wondering if there is any other way to identify which machine it could be coming from? The ISP has NO useful information such as source port, destination port, destination IP... nothing. I am running DD-WRT on my router, Windows 7 PC and a Windows XP PC.

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  • Does RDNS for mail server have to match the mail server hostname exactly?

    - by threecheeseopera
    Typically when setting up a mail server, I create an rDNS record for the mail server IP to match the mail server hostname (ex: mail.example.com). Can I instead set the rDNS ptr to match the parent domain (e.g. example.com), if this server is being used for multiple purposes, and still send mail successfully (i.e. not be classified as spam b/c of mismatched rDNS)? Thanks! EDIT: The article at http://en.wikipedia.org/wiki/Forward_Confirmed_reverse_DNS seems to indicate that it might be more complicated than I had thought. For instance, 1) I did not know that you could have multiple PTR records for a given IP; 2) it appears that as long as each PTR record matches an A record, everything is good (basically nullifying my question). Would you agree?

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  • How to ban fans from a specific country - Facebook

    - by Lukas
    my question is kind of weird, because i want thousands of fans to dislike my page! Since this is not a common problem I hardly can find anything about it! my facebook page just got spammed with thousands of "fans" from a specific country. When I set a coountry restriction for that country, will the fans be banned and the number of fans be the same as before the spam-attack? I really need to get rid of those fans. I already restricted that country and facebook actually updated the chart where I can see where my fans are coming from. So fb knows that I have those "fans", but the number of likes remains the same... Any idea? It is not possible to ban every fan 1 by 1 because I can only see the last 100 fans.

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  • SMTP hacked by spammer using base64 encoding to authenticate

    - by Throlkim
    Over the past day we've detected someone from China using our server to send spam email. It's very likely that he's using a weak username/password to access our SMTP server, but the problem is that he appears to be using base64 encoding to prevent us from finding out which account he's using. Here's an example from the maillog: May 5 05:52:15 195396-app3 smtp_auth: SMTP connect from (null)@193.14.55.59.broad.gz.jx.dynamic.163data.com.cn [59.55.14.193] May 5 05:52:15 195396-app3 smtp_auth: smtp_auth: SMTP user info : logged in from (null)@193.14.55.59.broad.gz.jx.dynamic.163data.com.cn [59.55.14.193] Is there any way to detect which account it is that he's using?

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  • does it still have any sense to directly drop mails that trigger RBLs?

    - by Luke404
    Once upon a time, using RBLs to drop mails was actually a good idea. These days seems it is no more possible for a reason or the other, so every one switched / is_switching to just use RBLs as another test in score based antispam solutions (read: SpamAssassin & friends). This gives good results, but neglects one of the benefits of RBLs, namely the ability to reject (supposed) spam before even receiving the message body. Is still there any RBL that makes sense to use that way, to hardly reject anything that fires a match in that list? If there are people doing it that way, do you ever get false positives due to the list?

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  • Postfix block senders outside from local domains

    - by Tibor Peter Toth
    I would like to block every mail that is coming in from a domain that is running on my server. Example: I have domain1.com on my mail server and I'm getting a mail from outside with an email address of [email protected] Then I know it's a Spam, because domain1.com is on my server, so the sender cannot come from outside. I want postfix to check for this, and simply block these kind of emails. I know this is a function in postfix, just don't know which one. Thanks.

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  • Offlineimap -- push changes to all folders; only pull from INBOX folder

    - by g33kz0r
    I would like to be able to set up offlineimap to do the following Sync Remote/INBOX - Local Sync Local/Maildirs/* - Remote Possible? The use case here is: I download all new mail from my remote IMAP INBOX folder with offlineimap. offlineimap's posthook command calls a custom python script which does junk filtering, then sorts and categorizes my mail in the local INBOX folder to various local maildirs based on sender, etc. I read my mail with mutt and perhaps do some more categorization. ? Step 4 is what I'm after. I want offlineimap to push my local changes (categorization, filtering, deletion in the case of spam) back to the various folders on the imap server, but as you can see, there's no need for me to be pulling any changes from folders other than Remote/INBOX, as no changes happen on the IMAP server itself. I hope that's a clear explanation of the problem.

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  • Configure Postini and emailreg.org

    - by crn
    One of our companies uses Postini services as our spam filtering service. Unfortunately, the company has been tagged as a spammer and we're trying to use emailreg.org to whitelist us. Emailreg.org wants us to add a CNAME which points to their domain (emaireg.org), while Postini has us add MX records (such as domainname.s7a1.psmtp.com. Here are my questions: 1. Can adding Emaireg's CNAME cause either Postini to not work or our emails to be lost? 2. Which is order of execution (do the email go to Postini and upon their return to EmailReg or is it the other way around)? 3. Is there anything of which I should be aware when using such a setup? Thanks, in advance, for all your help!

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