Postfix reverse DNS request issue?

amartinez · *nix forums beginner Joined: 29 Jan 2010 Posts: 1

Some time ago I followed a tutorial from workaround.org to install on a debian lenny a postfix with virtual domains(my postconf -n its on http://pastebin.com/d1c320985). I created one single virtual domain (domain1.com)and I configured the DNS server(wich is on the same machine that this postfix installation) with the domain zone file as its explained in the tutorial(the DNS file its on http://pastebin.com/m287f8709 ). This domani works fine with all MXs. But some days ago I installed a second domain (DNS FILE IN http://pastebin.com/m3b2d06e2). It recieve emails without problem but when I try to send emails to some mx like the mx from yahoo my emails are considered like spam and some mx directly don't accept the emails form that second domain. my syslog give this msg: http://pastebin.com/mb3e84fa and I supose that its related with the reverse DNS request. if this is true and the problem its related with the PTR entry, one IP can have several PTR records? how I have to configure my server to serve severeal domain with one IP address and to don't be mark like spam to yahoos servers or other ones?¿thanks for reading this lines.

mihai · *nix forums addict Joined: 27 Jan 2005 Posts: 72

the error you showed seems to be because the user you are trying to send email to doesn't exist on that host.
It's like you connect to a smtp server and try to use it to relay messages through it.
Reverse DNS problems can be an important factor when filters mark messages as spam but if it already works for one domain it should work for the other too since, the mail servers block you based on the ip which creates the connection to them ( or the host in the HELO/EHLO ) and that hasn't changed just because you send a message with a different sender.

rajarshi

just add a mx record against the the new virtual domain.

regards

rajarshi

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