View source for Talk:HowTos/Complete Postfix

This solution has a big disadvantage: Postfix only checks for the domain. As soon as the domain is correct, the mail is accepted, which leads to bounces if the email address doesn't exists.

This behaviour can be used to launch DOS-Attacks on other mail servers. Imagine you send a email with 500 CC's with correct domain but non existing user part. The result is that you get 500 bounces to the reply-to address.


So my first step was to introduce a check for the local address to exist which is quite easy:

'''local_recipient_maps = $alias_maps, $transport_maps'''

Thus all non existing email addresses won't be accepted anymore. 

One thing that is missing for me is that the alias processing is done inside Scalix. As I want to use DSPAM, I would prefer to do the Alias processing already inside postfix, so that i can guarantie that only Mails to the primary Mail addresses ( the original Users )  will be sent to Scalix. 

As soon as I've sorted out the correct Alias setting for postfix I'll post them here


Have fun Marc