postfix-users May 2014 archive
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postfix-users: Re: Wait if downstream MTA accepts mail - reject

Re: Wait if downstream MTA accepts mail - reject if not

From: Wietse Venema <wietse_at_nospam>
Date: Thu May 08 2014 - 21:33:40 GMT
To: Sebastian Wiesinger <postfix-users@ml.karotte.org>

Sebastian Wiesinger:
> Hello,
>
> I have some users that forward their mail to GMAIL. This is
> implemented with virtual alias maps. So postfix forwards:
>
> user@example.com -> example.user@gmail.com
>
> 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.

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.

        Wietse