[Dovecot] Modifying LDAP search results for user_attrs

I need to authenticate users via LDAP either by mailaddress or login name. In both cases the mailbox location is /src/mail/%d/%n. I can easily deduct that path from the mailaddress, but not so from the login name.

Can I get the mail address as part of fetching user_attrs and modify it on the fly? Something along the lines of this:

user_attrs = mail:/srv/mail/%d/%n=home,uidNumber=uid,gidNumber=gid

Or would I be able to modify this with a post-login script?

p@rick

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