Am Di, 21.05.13 um 16:40:09 Uhr schrieb Christian postfix@zp1.net:

Can I have dual authentication ? Is something like this possible ?

virtual_alias_maps = hash:/etc/postfix/virtual , proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf

these are only mail address maps, nothing to do with authentication.

but yes, you can use more than one lookup and this is not uncommon.

e.g. here is what I have there:

virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf, proxy:mysql:/etc/postfix/mysql_virtual_alias_domain_maps.cf, proxy:mysql:/etc/postfix/mysql_virtual_alias_domain_catchall_maps.cf hash:/etc/postfix/virtual