On Tue, 31 Aug 2010 11:20:37 -0400 (EDT), Wietse Venema <wie...@porcupine.org> wrote: > Stefan Seidel: >> This forwarding to external addresses however, makes my Postfix create >> backscatter. Example: >> hijac...@yahoo.example.com sends email to u...@mysystem.com -> >> virtual_alias_maps says: deliver it to interestedpa...@gmx.example.com >> However, the mail server at gmx.example.com may sometimes reject the >> message for any reason, which causes my Postfix to generate a bounce >> message to hijac...@yahoo.example.com - which is obviously not >> something anyone would want. > > There are two options that I am aware of. > 2) Don't forward SPAM. Well, if there's a zero-false-positive and 100% accurate spam filtering solution out there, please let me know.
> Other options involve loss of legitimate mail by dropping non-delivery > notifications for forwarded mail, which I cannot recommend. Ok, understood. Now how do I do that ;) Really, I don't care about NDNs for _forwarded_ mail, esp. since most of the mail traffic on this address is from mailing lists. Additionally, the mail is also stored to a local mailbox. I know, that means that users could fetch them via POP3/IMAP/Webmail, but as it is, they prefer getting it forwarded. Stefan
