RBLs will not protect you against exploited accounts sending malicious emails from popular providers (IPs with good reputation). In your particular case, gmail's rejection might be caused by a .zip file containing .exe or .scr file.
Marius. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sebastian Wiesinger Sent: Friday, May 9, 2014 1:02 AM To: Postfix Users Subject: Re: Wait if downstream MTA accepts mail - reject if not * Wietse Venema <[email protected]> [2014-05-08 23:36]: > Sebastian Wiesinger: > > Hello, > > > > I have some users that forward their mail to GMAIL. This is > > implemented with virtual alias maps. So postfix forwards: > > > > [email protected] -> [email protected] > > > > The problem is when SPAM mails get through all the postfix defences > > and get forwarded to GMAIL. GMAIL does some body checks and rejects > > the mail like this: > > It common for people to forward all mail including spam to Gmail, and > to discover that some of non-spam mail is not delivered as expected. I already have RBL checks any other policy in place that prevents most of the SPAM/Malware being accepted, but sometimes Google is more strict / has more advanced filtering it seems. > If you wait for Gmail to reject mail then it is already too late. > > The solution is "do not forward SPAM". Sorry, there is no simple > solution. Yeah, that was kind of expected. Thanks for the reply anyway. Regards Sebastian -- GPG Key: 0x93A0B9CE (F4F6 B1A3 866B 26E9 450A 9D82 58A2 D94A 93A0 B9CE) 'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE SCYTHE. -- Terry Pratchett, The Fifth Elephant
