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I am using dovecot with vpopmail and qmail and problems is percent hack that works with qmail-pop3d does not work with dovecot. So login works like that: firstname.lastname%domain.ext I need that function to work with dovecot too, and I am using stable 0.99.x series of dovecot. Problem is that some Apple machines client can't use at-symbol in their login names. So, where I need to hack