Don't save empty header lists
Don't save empty header lists

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