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Reverse DNS does not match SMTP banner
Posted: 15 May 2016 15:57
by mayrmart
Hi,
I am new to efa.
Just installed it first time and seems to work great
Just one small problem.
http://mxtoolbox.com/diagnostic.aspx is not really happy with my SMTP banner.
SMTP Banner Check Reverse DNS does not match SMTP Banner
Cant find where to change.
Thanks
Martin
Re: Reverse DNS does not match SMTP banner
Posted: 30 May 2016 13:29
by shawniverson
Does your forward DNS entry (MX) match your reverse DNS entry (PTR) in your public DNS?
Re: Reverse DNS does not match SMTP banner
Posted: 30 May 2016 13:33
by shawniverson
You can also telnet to your host on port 25 to check out your SMTP banner.
Re: Reverse DNS does not match SMTP banner
Posted: 30 May 2016 15:10
by mayrmart
Thanks.
found it
in /etc/postfix/main.cf
smtpd_banner = ESMTP EFA [your host name]
Martin
Re: Reverse DNS does not match SMTP banner
Posted: 23 Jun 2016 18:57
by ovizii
Can someone clarify?
I'm running EFA 3.0.1.1 and in my main.cf smtpd_banner is commented and yet my rDNS seems to work just fine so where is it coming from?
Re: Reverse DNS does not match SMTP banner
Posted: 26 Jun 2016 16:38
by shawniverson
Postfix supplies a default banner based on the domain name defined in postfix if a custom one is not specified.