On Fri, Sep 30, 2016 at 01:02:34PM +0200, Ralph Seichter wrote: > On 30.09.2016 12:26, Postfix User wrote: > > > 13822:Sep 30 02:00:40 scorpio postfix/smtpd[83056]: > > connect from unknown[118.71.251.67] > > You can use reject_unknown_reverse_client_hostname, but I recommend > you don't. Many legitimate mail sources have not configured reverse > DNS entries.
Hmm, I have been using this for many years, since one time when my own PTR lookup failed and I found I was being rejected by gmail and numerous other providers. I admit I am not watching the logs, but likewise I have not had any complaints from users in this time. I think it's reasonable now to expect a legitimate SMTP client to have a PTR record, and perhaps in the not-too-distant future to expect PTR/A matching. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:
