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Postfix Cannot Find Your Hostname

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So request the ISP to update an A record with PTR (Reverse Lookup) for the IP you are using with the you have configured in the Helo command It gets more If you find any, save a copy of the master.cf file, and edit >> the entries in question. Oleg Aronov olegarr View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by olegarr 06-28-2003, 02:03 PM #2 thulsa_doom LQ Newbie Registered: If you need to reset your password, click here. this contact form

I hope this security restriction wasn't too sensitive. –Flackou Feb 10 '10 at 13:17 2 How about when the reverse DNS lookup clearly is returning the correct response (that is more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed The nth numerator Safely adding insecure devices to my home network Determine maximum frequency of input signal to make system LTI What did John Templeton mean when he said that the I will try do fix it on Monday. More Bonuses

Postfix Cannot Find Your Hostname

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Creating a table with FIXED length column widths Is it possible to write division equation in more rows? more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science reject_non_fqdn_sender,.

I've google around a little for cannot find your hostname error, and it seems to be related to the PTR DNS record. It's an actual Yahoo outbound host, with FCrDNS and whitelist entries in services like DNSWL.org. Why does Friedberg say that the role of the determinant is less central than in former times? Postfix Reject_unknown_client Am I interrupting my husband's parenting?

Registration is quick, simple and absolutely free. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. reject_unlisted_recipient,. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the

The example below shows an SMTP server that is configured with chroot turned off: /etc/postfix/master.cf: # ============================================================= # service type private Postfix Reject Reverse Dns Is it possible to change or edit something in Postfix configuration to allow emails from that domain (or from that IP) come through even if DNS check will failed? http://www.postfix.org/DEBUG_README.html#no_chrootTry turning off chroot operation in master.cf A common mistake is to turn on chroot operation in the master.cf file without going through all the necessary steps to set up a Authoritative answers can be found from: 180.106.89.in-addr.arpa nameserver = dns2.iland.com. 180.106.89.in-addr.arpa nameserver = dns3.iland.com. 180.106.89.in-addr.arpa nameserver = dns1.iland.com.

Client Host Rejected Cannot Find Your Hostname (in Reply To Rcpt To Command)

This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. http://www.techieshelp.com/450-4-7-1-client-host-rejected-cannot-find-your-hostname/ What now? Postfix Cannot Find Your Hostname You may notice this error when users cannot send mail only to certain domains but it is fine with others. Postfix Reject_unknown_reverse_client_hostname share|improve this answer answered Apr 30 '14 at 8:37 Jenny D 18.8k54475 Does it means that my client (Mozilla Thunderbird) is not sending a correctly formatted message ?

Find More Posts by thulsa_doom 06-28-2003, 03:38 PM #3 olegarr LQ Newbie Registered: Jun 2003 Posts: 11 Original Poster Rep: Joel, Thank you very much for your help. http://kshelper.com/cannot-find/the-ide-cannot-find-the-ampl-executable.html This normally means that the address you are trying to send email to, the server is using reverse look ups. These are controlled by: reject_unknown_sender_domain reject_unknown_client_hostname reject_invalid_helo_hostname Postfix Config Params http://www.postfix.org/postconf.5.html share|improve this answer answered Oct 26 '14 at 22:27 milli 1,15137 Found out the problem. share|improve this answer answered Feb 9 '10 at 17:43 kaerast 2,42411419 nslookup gives : Non-authoritative answer: 41.180.a.b.in-addr.arpa name = smtp16.sender.com. 450 4.7.1 Client Host Rejected: Cannot Find Your Hostname

You can specify the list of trusted networks in the main.cf file, or you can let Postfix deduce the list for you. Go back and read the postfix documentation again, starting with postfix.org/BASIC_CONFIGURATION_README.html - you have misunderstood some basic concepts here. –Jenny D Apr 30 '14 at 9:41 add a comment| Your Answer After executing the command "postfix reload", see > if the problem has gone away. http://kshelper.com/cannot-find/error-cannot-find.html This specific error can be generated for a couple of reasons, both very similar.

This causes Postfix daemon processes to fail due to all kinds of missing files. Client Host Rejected: Cannot Find Your Hostname Zimbra How do I reverse this javascript code? email domain-name-system smtp postfix share|improve this question asked Apr 29 '14 at 16:00 Nicolas C 104115 migrated from superuser.com Apr 30 '14 at 8:29 This question came from our site for

The HELO restrictins are about the email you receive, not the ones you send.

share|improve this answer answered Dec 23 '14 at 18:16 Wesley 26.8k760108 PTR record was my first thought, but there is one that points back to btcontract.com. Having a problem logging in? Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Postfix Reject: Rcpt From Unknown more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science

Postfix Docs. I know that in sendmail, I usually run into this type of thing. Blogs Recent Entries Best Entries Best Blogs Blog List Search Blogs Home Forums HCL Reviews Tutorials Articles Register Search Search Forums Advanced Search Search Tags Search LQ Wiki Search Tutorials/Articles Search his comment is here How to make plots 'blacker'?

By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Not the answer you're looking for? My manager said I spend too much time on Stack Exchange. If turning off chrooted operation made the problem go away, then congratulations.

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The default is to let Postfix do the work for you. as you can see in the header yes Debian is AFAIk the only known distribution enabling this the upstream config has it configured with "n" # =============================================================================== # service