I did a migration from version 3 (CentOS 6) to version 4 (CentOS 8) yesterday and so far everything works fine (almost out of the box).
Thank you for the step by step migration guide!
However there is this strange behaviour where the from header of mails routed from another internal postfix through eFa are changed from "root@domain1.com" to "root@efa.domain1.com". So eFa overrides the domain part with its own hostname and domain. Which makes it difficult for recipients to identify where mails actually came from.
This happens only when sending from root@ and only if sender and eFa domain are the same.
e.g.
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from "root@domain1.com" will be changed to "root@efa.domain1.com"
from "root2@domain1.com" - works
from "root@domain2.com" - works
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masquerade_domains
The only thing I realized: it stops when removing msmilter from smtpd_milters.
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#smtpd_milters = inet:localhost:8891, inet:localhost:8893, inet:127.0.0.1:33333
smtpd_milters = inet:localhost:8891, inet:localhost:8893