Disable reverse PTR check in Zimbra and force accept from invalid domains

Posted by ewwhite on Server Fault See other posts from Server Fault or by ewwhite
Published on 2011-05-23T18:18:34Z Indexed on 2012/11/16 11:04 UTC
Read the original article Hit count: 1092

Filed under:

postfix

|

reverse-dns

|

zimbra

I've moved an older Sendmail/Dovecot system to a Zimbra community edition system. I need to be able to receive messages from certain standalone Linux hosts that may not have valid A records or proper reverse DNS entries established (e.g. AT&T is the ISP or systems sitting on a consumer-level ISP). Establishing the reverse DNS or setting a SMARTHOST is not an option.

The error I get in zimbra.log is:

zimbra postfix/smtp[2200]: DB83B231B53: to=<root@host_name.baddomain.com>, relay=none, delay=0.07, delays=0.06/0/0/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=host_name.baddomain.com type=A: Host not found

How can I override this? Is this more of a Postfix issue or is it Zimbra?

edit - The problem seems to be with an underscore in the hostname of the server. So it's a problem with root@host_name.baddomain.com. Again, how can I override this in Zimbra?

© Server Fault or respective owner

Related posts about postfix

postfix: Temporary lookup failure

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to:… >>> More
postfix with mailman

as seen on Server Fault - Search for 'Server Fault'
What should happen is that [email protected] should be delivered to that users inbox on localhost, user@localhost. Thunderbird works fine at reading user@localhost. I'm just using a small portion of postfix-dovecot with Ubuntu mailman. How can I get postfix to recognize the FQDN and deliver… >>> More
saslauthd + PostFix producing password verification and authentication errors

as seen on Server Fault - Search for 'Server Fault'
So I'm trying to setup PostFix while using SASL (Cyrus variety preferred, I was using dovecot earlier but I'm switching from dovecot to courier so I want to use cyrus instead of dovecot) but I seem to be having issues. Here are the errors I'm receiving: ==> mail.log <== Aug 10 05:11:49 crazyinsanoman… >>> More
centos postfix send email problem

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a big problem with postfix. I can receive mail in webmin and outlook but I can't send (only on local I can - user to user). Dovecot is working just fine. Sendmail is disable. Please help me. postfix -n postfix: invalid option -- n postfix: fatal: usage: postfix [-c config_dir] [-Dv]… >>> More
Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend

as seen on Server Fault - Search for 'Server Fault'
So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as… >>> More

Related posts about reverse-dns

Reverse DNS does not match SMTP banner vs Reverse DNS mismatch

as seen on Server Fault - Search for 'Server Fault'
I have to make decision whether my Reverse DNS should match SMTP banner but Reverse DNS to DNS and vice versa stays different or vice versa. Which one to choose? I have an 2x Exchange 2010 server with one SMTP Sender with TMG 2010. TMG has 2 links connected so that we have 2 separate internet providers… >>> More
What is reverse DNS?

as seen on Server Fault - Search for 'Server Fault'
*.in-addr.arpa domains: lot of requests in my OpenDNS account. I know this should be normal and it's about reverse DNS. I've been reading here and there but still I can't really get how it works and why I get so much requests (higher number than www.google.com). I'd just need someone that, like Einstein… >>> More
Reverse DNS Lookup from the Command Line

as seen on Server Fault - Search for 'Server Fault'
I'd like to get a list of all domains pointed to a certain IP address. Is there a way to get this information from the command line? Nothing like "host", "nslookup" or "dig -x". Those return the hostname of the IP address which, while helpful, is only part of what I want returned. >>> More
How long does a reverse DNS lookup take?

as seen on Stack Overflow - Search for 'Stack Overflow'
How long should I expect a reverse lookup take? 100 milliseconds? 1 second? 10 second? 30 seconds? What's your experience? Why? We're debating adding a feature to our server software which would require a reverse DNS lookup each time a client connects. The lookup would be done synchronously… >>> More
Creating reverse DNS entries which resolve [closed]

as seen on Server Fault - Search for 'Server Fault'
Possible Duplicate: Reverse DNS - how to correctly configure for SMTP delivery I ran a DNS check and ended up with the following error: FAIL: Found reverse DNS entries which don't resolves IP-IP-IP-IP.HOST.DOMAIN.TLD ? ??? All IP's reverse DNS entries should resolve back to IP address (MX… >>> More