Re: distribution lists.

[mouss]

Mauro Sanna wrote:
Almost. You should probably still have at least one domain listed, that
is used for the right-hand-side of aliases where the target should be a
local delivery. One approach is to use:
    main.cf:
        mydestination = local.invalid

	smtpd_sender_restrictions = 
		check_sender_access regexp:/etc/postfix/reject_invalid
                check_recipient_access regexp:/etc/postfix/reject_invalid


I put all checks in smtpd_recipient_restrictions.

put them under smtpd_sender_restrictions, as suggested. for safety, only 
use smtpd_recipient_restrictions for spam related checks, unless you 
know what you are doing.


Is it the same?

Not really. an OK in smtpd_sender_restrictions does not skip 
smtpd_recipient_restrictions. In particular, it doesn't make you an open 
relay.