final fix: text-content subtype wasn't defaulted to plain
final fix: text-content subtype wasn't defaulted to plain

LTD-Beget/dovecot,damoxc/dovecot,LTD-Beget/dovecot,damoxc/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,LTD-Beget/dovecot,damoxc/dovecot,damoxc/dovecot,Distrotech/dovecot,Distrotech/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot