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• SPF record doesn't work (not sure which DNS server to tweak)

  - by Ion

  Problem: Google (and perhaps others) marks our emails as SPF neutral. Let me give you some background about the setup: initially got a dedicated server (Hetzner) with Plesk installed to host a domain/web application, let's say: bigjaws.com. Plesk automatically creates a DNS zone for it with some records for the various services it provides out of the box, e.g. webmail.bigjaws.com as a CNAME to bigjaws.com to provide Horde/whatever, etc. Let me point out four relevant of these records (where XXX.XXX.XXX.158 is our dedicated IP): bigjaws.com. A XXX.XXX.XXX.158 mail.bigjaws.com. A XXX.XXX.XXX.158 bigjaws.com MX (10) mail.bigjaws.com. bigjaws.com. TXT v=spf1 +a +mx -all The above records are not(?) valid anymore though, because after using this dedicated server for a while, our site got bigger and bigger so we decided to move our operations over to AWS (EC2, RDS, ELB, etc), but we retained the mail functionality as is, i.e. emails from [email protected] are sent by connecting to our dedicated server where Plesk takes care of things. This was decided in order not to setup anything from scratch. Of course for all DNS-related things we now use Route53. In Route53 I have the following records: mail.schoox.com. A XXX.XXX.XXX.158 bigjaws.com. MX (10) mail.bigjaws.com bigjaws.com. SPF "v=spf1 +ip4:XXX.XXX.XXX.158 +mx ~all" From my understanding of SPF, the SPF status should have been passed: I designate that all email being sent by bigjaws.com from XXX.XXX.XXX.158 are valid/not spam (I added +mx there but I'm not sure if needed). When a mail server receives an email, doesn't it lookup the SPF record of the domain and checks against the IP it got the email from? Checking with spfquery: root@box:~# spfquery -ip XXX.XXX.XXX.158 -sender [email protected] -rcpt-to [email protected] StartError Context: Failed to query MAIL-FROM ErrorCode: (2) Could not find a valid SPF record Error: No DNS data for 'bigjaws.com'. EndError noneneutral Please see http://www.openspf.org/Why?id=employee1%40bigjaws.com&ip=XXX.XXX.XXX.158&receiver=spfquery : Reason: default spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com Received-SPF: neutral (spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com) client-ip=XXX.XXX.XXX.158; [email protected]; If I go to the address listed above (openspf.org) it tells me that the message should have been accepted(!): spfquery rejected a message that claimed an envelope sender address of [email protected]. spfquery received a message from static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) that claimed an envelope sender address of [email protected]. The domain bigjaws.com has authorized static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) to send mail on its behalf, so the message should have been accepted. It is impossible for us to say why it was rejected. What should I do? If the problem persists, contact the bigjaws.com postmaster. Also, here are some headers from an email sent by one of our [email protected] addresses to a gmail.com address (by the way, bigjaws.de listed in the "Received: from" field was the initial domain hosted on the dedicated server before adding the .com one -- both are still listed as separate subscriptions under Plesk). Delivered-To: [email protected] Received: by 10.14.177.70 with SMTP id c46csp289656eem; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) X-Received: by 10.14.102.66 with SMTP id c42mr306186eeg.47.1382515860386; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) Return-Path: <[email protected]> Received: from bigjaws.de (static.158.XXX.XXX.XXX.clients.your-server.de. [XXX.XXX.XXX.158]) by mx.google.com with ESMTPS id l4si19438578eew.161.2013.10.23.01.10.59 for <[email protected]> (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 23 Oct 2013 01:10:59 -0700 (PDT) Received-SPF: neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=XXX.XXX.XXX.158; Authentication-Results: mx.google.com; spf=neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected] DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=bigjaws.com; b=WwRAS0WKjp9lO17iMluYPXOHzqRcOueiQT4rPdvy3WFf0QzoXiy6rLfxU/Ra53jL1vlPbwlLNa5gjoJBi7ZwKfUcvs3s02hJI7b3ozl0fEgJtTPKoCfnwl4bLPbtXNFu; h=Received:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:Content-Type:Content-Transfer-Encoding; Received: (qmail 22722 invoked from network); 23 Oct 2013 10:10:59 +0200 Received: from hostname.static.ISP.com (HELO ?192.168.1.60?) (YYY.YYY.ISP.IP) by static.158.XXX.XXX.XXX.clients.your-server.de. with ESMTPSA (DHE-RSA-AES256-SHA encrypted, authenticated); 23 Oct 2013 10:10:59 +0200 Message-ID: <[email protected]> Date: Wed, 23 Oct 2013 11:11:00 +0300 From: BigJaws Employee <[email protected]> User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: [email protected] Subject: test SPF Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit test SPF Any ideas why SPF is not working correctly? Also, are there any DNS settings that are not needed anymore and create a problem?

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• Labels mail merge repeats on subsequent pages?

  - by leeand00

  I'm trying to do a mail merge to print to labels. The first field in the document does not contain a { NEXT } field code, and because of this the records repeat between label pages for example: Notice how the records shift to the left as the next page is displayed? But how they start over again in an off by one manner? Now I've tried to fix this by using the first record displayed on a page to see if the page number is 1. If it not on page 1 of the mail merge then it should just move to the next record; otherwise it should just display the first record: This doesn't work however, because when I do the preview and display the {page} field code, it reports that I am always on page 1 and thus the same behavior continues instead of just moving to the next record on the next page.

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• Cannot access site via IP / hostname

  - by DaveB

  I am renting a VPS with Debian installed running JBoss AS6 for my web app. I recently had some problems with my DNS hosts as they messed up the A-records for my domain which caused some new A-records to be added by mistake The DNS problem is now sorted and the domain is working ok, however I noticed that the web server no longer responds via direct IP or hostname in a web browser (although it pings ok and I can SSH in using the hostname ok) Is there any explanation for this? I am using rinetd to forward traffic from 80 to port 8080 but thats been ok for a while Any suggestions would be appreciated Regards

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• Xmail shows error at Gmail

  - by Karthik Malla

  Hello I am using Xmail server at IP 65.75.241.26 hosted at www.softmail.me using which I can send and receive email to/from all email service providers but unable to receive back from Gmail. This error lies only with Gmail. Experts says that Gmail requires proper working MX records where as for other emailing providers do not bother much. Is MX records the solution for my problem? Or is there any other issue? My mailserver outgoing at softmail.me:25 My mailserver incoming at softmail.me:110 Please help me how to get rid of this issue.

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• View Public Key in Domain Key for a Domain

  - by Josh

  Using Jeff's blog post I'm creating domain keys for my account. I wanted to verify the setup using Get or Host command with Bind for Windows but I'm lost one of the commands. I can see view the _domainkey. txt file with this command: host -t txt _domainkey.stackoverflow.com but I'm at a loss at how I'd find the selector record. Jeff points out it can be anything before the before the period in "._domainkey.domain.com" but how would I list all records if I didn't know the exact query name? Is there a wildcard I could use to view all TXT or all records under this section?

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• How to set up a DNS name server to always resolve to a constant IP address for every request

  - by Andy Higgins

  I am looking for a simple DNS name server set up to always return the same IP address no matter what the request is. The reason for this is we are a domain registrar and when a domain is first registered we need it to have valid name servers (and don't want to have to first create name server records before registering a domain). We will then subsequently change the name server records after the domain has been registered. I assume this is possible to do with bind but was wondering if there might be a simpler solution available using one of the more light weight name servers out there? Any suggestions on how to accomplish this in a simple manner will be appreciated.

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• Testing DNS configuration of domain by using hosts file?

  - by Alex Blundell

  I'm currently migrating a website to another server, and want to test the DNS configuration (more specifically, email mx records) before moving the domain over. I've configured the DNS on the new server to have mx entries for Google Apps in the same way that it's configured on the old server. The domain is controlled by nameservers on the old server at the moment, so the change would simply be updating the nameservers to the new servers. (What I'm getting at is DNS is controlled at the server level, not registrar level). Since the website has quite a number of users, I want to make sure the configuration is right before flicking the switch. For this, can I add an entry to the hosts file of my local computer to point the domain to the new server? I've done this, and the web server works, but would this also test the email mx records on the new server?

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• How to redirect the subdomain of a domain - Blogger

  - by Swader

  I have a blogger blog put up, and Google told me to add some A records in order to enable a www-free redirection to the full www domain. So by adding those, visiting bitfalls.com (which is my blog) should go to www.bitfalls.com, but this does not happen. Instead, I get a not found error. Is there anything else I should do? The records are as follows: Interestingly, even blog.bitfalls.com fails with a not found error, only when prefixed with www does it work. The other part of the question is - since my domain name is registered at name.com, and I simply redirect the bitfalls.com domain to bitfalls.blogspot.com as per Google's guides, how can I redirect a subdomain of the site, for example, code.bitfalls.com, to go to a specific folder on my hosting provider (hostgator - not name.com), without it triggering the blog?

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• Slow Inserts SQL Server 2005

  - by Achilles

  I'm researching an issue with the following information: We had a logging table with about 90k records in it that had inserts taking several seconds(approximately 10 to 20s) in extreme cases. One of the columns of the table stores XML as the XML datatype. The XML isn't being parsed during the insert, just stored. We tried truncating the table assuming that the issue was related the number of records(althought 90k seemed "normal") and the inserts still are performing poorly. While I know there are other issues that can cloud the issue, what would be some "check this first" ideas that could help me debug this issue? Thanks for any suggestions and help in advance.

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• exim4: multiple domains/IPs

  - by ButterdBread

  On my VPS I have 3 IPs which all have their own domain and their own reverse-DNS records. I have a website on each domain, sending emails. The problem is: the emails are rejected by many hosts because the reverse dns doesn't fit the host in the helo. All the emails are sent from the primary IP and therefore only one of the three domains work. I am looking for a way for exim to check which email adress i'm using to send the email and adapt the domain/IP transmitted in the helo. I have already tried many configurations but nothing has worked up to now. Simply changing MX-Records is impossible too, as I recieve (and also send) email via gmail and I don't want to set up my own webmail. Does anyone know a solution?

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• how to figure out why sites on my server aren't loading

  - by Derek

  I seem to randomly receive "page cannot load, cannot connect to server" errors for sites on one of my servers. when this happens, it seems to only happen on certain IPs or IP ranges at a time. I say this because while I'll get the error from my home laptop I'll be able to access the site fine from my work computer or from an offsite VPS. DNS records should already be fully propagated as these records were updated months ago. I have no idea how to diagnose what's going on. Is there a tool in cpanel or outside on the web that can help me figure out what's going on?

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• How to map email addresses on subdomains

  - by Glen Little

  Is it possible to create email addresses like these: [email protected] [email protected] [email protected] and have them all handled by one mail server, as three different mail boxes? (Many examples I've seen talk about directing mail to [email protected] into the same mail box as [email protected] - but this is not what I'm looking for.) I haven't specified the server technology being used because I'm wondering if this is generally possible. If you know that server x can do this, please mention it in your answer! Is it correct that MX records can be set to direct email to all subdomains *.mydomain.com to one mail server? Is that still true if there are also web sites at those subdomains (using A records)? Thanks!

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• Could a DNSSEC at level n manipulate a zone at level n+2?

  - by jroith

  With some people wondering how DNSSEC could affect global censorship, I'd like to know if DNSSEC could protect a zone from being partially modified by a grandparent zone. (The point of this question is not to suggest that ICANN or it's members are not be trusted, but to figure out how DNSSEC affects the power they could exercise in theory.) For example: ICANN owns the root zone The .de zone is delegated to DENIC, Germany. Assume example.de is delegated to some 3rd party. Now, assuming DENIC does not remove example.de from their zone, would it be possible for them to redirect the subdomain abc.example.de elsewhere by returning signed records from the .de servers for abc.example.de ? Similarly, would it be possible for the DNS root to easily return signed fake records of a third-level domain xy.z while the second-level zone z is not participating in this and is not affected otherwise?

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• Is Exchange protected from/allow back dated emails?

  - by David

  Does Exchange Server adequately protect against backdating items in a mailbox folder? I want to determine from an auditing perspective what level of risk exists/what trust can be put into Exchange database records. Is there a (mis)feature that allows end point users to modify the sent/recieved date fields on their own messages? Is there a reasonable way short of hand editing the files for an Exchange Server admin to make such a change? And most importantly: Is there any kind of "sequence number" that we could use to audit Exchange records for evidence of date manipulation (ex. msg100 = Dec 15, msg101 = Dec 10, msg102 = Dec 16)

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• Extracting a line section of mysql backup using sed

  - by carpii

  I occasionally need to extract a single record from a mysqlbackup To do this, I first extract the single table I want from the backup... sed -n -e '/CREATE TABLE.*usertext/,/CREATE TABLE/p' 20120930_backup.sql > table.sql In table.sql, the records are batched using extended inserts (with maybe 100 records per insert before it creates a new line starting with INSERT INTO), so they look like... INSERT INTO usertext VALUES (1, field2 etc), (2, field2 etc), INSERT INTO usertext VALUES (101, field2 etc), (102, field2 etc), ... Im trying to extract record 239560 from this, using... sed -n -e '/(239560.*/,/)/p' table.sql > record.sql Ie.. start streaming when it finds 239560, and stop when it hits the closing bracket But this isnt working as I hoped, it just results in the full insert batch being output. Please can someone give me some pointers as to where Im going wrong? Would I be better off using awk for extracting segments of lines, and use sed for extracting lines within a file?

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• Oracle redo log performance degradation when inserting

  - by Aldarund

  I have a oracle 11g database. I'm testing in for inserts. The database running in noarchive mode. I have 3 redo log configured, each 2gb. I'm trying to insert data into test table. At begin it goes fine with 15k ins/second. I make a commit after 200 inserts. But after about 1.3m inserted records it become really slow, about 1-2k ins/second. As i noticed in resource explorer at this point we have filled all redo logs and so the inserts from this points work slow. So my question is why it become so slow when it fills redo logs, even if i commit each 200 records. And how this situation can be fixed ( except the turning off logging completely at inserts)

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• Using DNS entries to determine location

  - by Raphink

  I'm trying to think of a clean way to determine the location of machines (mainly, which datacenter they belong to) based on their network settings. I would like it to be dynamic, and I'm thinking of using special DNS records that would be specific to the DNS server in each datacenter. For example, you could have: root@machine1# dig TXT mysite ... mysite 3600 IN TXT "DC1" ... root@machine2# dig TXT mysite ... mysite 3600 IN TXT "DC2" ... etc. I know that DNS has a special LOC record for location, but it takes coordinates, so it doesn't help in my case. Is there a standard way of addressing this issue, another special type of record for it, or some standard entries in TXT records?

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• Empty AAAA DNS Record with long TTL?

  - by Joel K

  I pay for a DNS service based on queries per second. We are not using IPv6, but a large number of queries (that I pay for) are coming in for AAAA records. I understand that most DNS stacks will now ask for A and AAAAs at the same time, and that I can't change that. What I /would/ like to do is put something in the AAAA records with a long TTL. (decreasing my hit rate) Is there anything I can put? Null? The equivalent IPv4 Address? Any guidance would be appreciated.

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• Database implementation question?

  - by gundam

  consider a disk with a sector size of 512 bytes, 2000 tracks/surface, 50 sectors/track, 5 doubled sided platters, average seek time is 10 msec. Assume a block size of 1024-byte is selected. Assume a file that contains 100,000 records of 100-byte each is to be stored on the disk, and NONE of the reocd can be spanned 2 blocks. How many blocks are needed to store the entire file?? If the file is arranged sequentially on disk, how many surfaces are required?? Now, i have calculated that 10,000 blocks are needed to store 100,000 records. But i am not sure how to find out the answer of the surfaces required. I only calculated the capacity of track is 25KB and capacity of surface is 50,000 KB But I don't know how to calculate the number of surfaces... Could anyone help me how to get the answer? Thanks a lot!!

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• SMTP redirecting to other port than 25

  - by Roalt

  How can you redirect your smtp traffic to another port than 25? My ISP blocks incoming traffic to port 25. I've been using ZoneEdit.com for this purpose for years (incoming mail traffic goes to another port and I redirect it via my firewall internally to port 25), but with the new system I cannot do it anymore. I'm not sure if I can do this by configuring MX and A records in the right way or if I need a SMTP redirecting service (such as rollernet.us)? I'm not an expert in Zone records but generally I know my way around for website traffic.

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• How is a nameserver chosen when DNS resolution occurs?

  - by Richard

  I have a few domains hosted on nameservers at Zerigo. Zerigo have 5 nameservers and I have all 5 in the nameserver records for my domains. The nameservers are in different geographical locations (3 in the US, one in London, and one in Amsterdam). When someone goes to a domain of mine and the DNS resolution occurs, how will it choose a nameserver? Will it always go to the nearest geographical one? Will it go to the one with fewest hops? Will it just choose one at random? (This is assuming all 5 are functioning perfectly). Thanks EDIT: And does it make any difference which order I list the nameservers in on the domain name records?

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• Redirecting email from from domain registrar to hosting comapny mailbox

  - by jmoreno

  I have the domain example.com registered with company A I have the hosting with company B (ServerGrove) Company A offers me simple parking, and company B offers me mailbox service. What I would like is to use the hosting company mail service. How do I configure the DNS records in company A to be forwarded to company B mailbox? I think I have to add a MX record to company A's configuration, and then the same in company B's DNS records, is this correct? I think I'm mixing concepts, and cannot see a clear solution, I've tried several configurations but all failed. Any help would be appreciated. Regards.

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• Redirect subdomain.example.org to somethingelse.com hidden to the user?

  - by moontear

  I'm not knowledgeable at all about C-NAMES, A-RECORDS, name servers and the like, so just bear with me on this one: I want to redirect subdomain.example.org to another domain somethingelse.com. I do own both domains and both domains run on shared hosting. When creating a subdomain, all I can do out-of-the-box is do a HTTP redirect (302, yuck!) or a frame redirect. I also can set the DNS records on one host like nameserver, CNAME - but I would have know clue what I am doing. Please explain to me how routing with nameservers works and how I should (even if not possible with my current host) redirect subdomain.example.org to somethingelse.com with the user-visible URL staying at "subdomain.example.org"

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• Database implementation question? [closed]

  - by gundam

  consider a disk with a sector size of 512 bytes, 2000 tracks/surface, 50 sectors/track, 5 doubled sided platters, average seek time is 10 msec. Assume a block size of 1024-byte is selected. Assume a file that contains 100,000 records of 100-byte each is to be stored on the disk, and NONE of the reocd can be spanned 2 blocks. How many blocks are needed to store the entire file?? If the file is arranged sequentially on disk, how many surfaces are required?? Now, i have calculated that 10,000 blocks are needed to store 100,000 records. But i am not sure how to find out the answer of the surfaces required. I only calculated the capacity of track is 25KB and capacity of surface is 50,000 KB But I don't know how to calculate the number of surfaces... Could anyone help me how to get the answer? Thanks a lot!!

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• Redirect subdomain.example.org to somethingelse.com hidden to the user?

  - by moontear

  I'm not knowledgeable at all about C-NAMES, A-RECORDS, name servers and the like, so just bear with me on this one: I want to redirect subdomain.example.org to another domain somethingelse.com. I do own both domains and both domains run on shared hosting. When creating a subdomain, all I can do out-of-the-box is do a HTTP redirect (302, yuck!) or a frame redirect. I also can set the DNS records on one host like nameserver, CNAME - but I would have know clue what I am doing. Please explain to me how routing with nameservers works and how I should (even if not possible with my current host) redirect subdomain.example.org to somethingelse.com with the user-visible URL staying at "subdomain.example.org"

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