I want to confirm something I came across while playing with a test Postfix/Dovecot configuration. First, I am using Postfix 2.9.1 installed on a fully updated Debian stable (the backports version is 2.9.1-2~bpo60+1).
I need to reject recipient-extension addresses not specifically allowed by a .forward-extension file in the user's home directory during the SMTP conversation, but allow any recipient-extension for which the user has defined a .forward-extension file. As far as I can tell, that is not possible (note, my experience with Postfix is *very* limited, thus this email) using any of the default alias maps, because the addresses fall back to the recipient. I have tried only using the "$alias_maps" by assigning "local_recipient_maps = $alias_maps", then placing the user name in the /etc/aliases file as "dave: dave". I have tried using the virtual_alias_maps and placing only the following lines in /etc/postfix/virtual. #v+ d...@caterva.org dave dave-t...@caterva.org dave-test #v- In both cases when sending email to dave-anothert...@caterva.org Postfix determined that dave-test existed because Postfix defaulted to the user dave because the user existed. Note that I have been able to get Postfix to do everything else I wanted: Local, virtual, and internet delivery all work well. So, my two questions. 1) Am I correct that blocking recipient addresses which consist of an existing user with an extension not defined by that user (in a .forward-extension file) is not possible using Postfix using just the configuration options available in main.cf? 2) Has anyone done something similar to what I want with a milter/plugin which my search-fu and documentation reading has not uncovered? If more information is needed please let me know and I will happily provide. Regards, -- dave [ please don't CC me ]
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