dovecot enable plaintext auth
disable_plaintext_auth = no
service dovecot restart
* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=CRAM-MD5] Dovecot (Ubuntu) ready
dovecot enable plaintext auth
disable_plaintext_auth = no
service dovecot restart
* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=CRAM-MD5] Dovecot (Ubuntu) ready