pop3: If UIDL using %f/%m/%g can't be fetched, mention pop3_uidl_format in error message.
pop3: If UIDL using %f/%m/%g can't be fetched, mention pop3_uidl_format in error message.

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch