Hello I cannot send mails from my phone but I can send perfectly using the localhost roundcube client, so I think it's something related to postfix/authentication. My configuration in the Android mail client for the outgoing server is: Server: my server hostname Security: TLS (accept all certs) Port: 587 No authentication. LOG: Apr 29 15:06:13 patagon postfix/submission/smtpd[16034]: connect from xxxxxxx Apr 29 15:06:15 patagon postfix/submission/smtpd[16034]: NOQUEUE: reject: RCPT from xxxxxxxx: 554 5.7.1 <xxxxxxxx>: Client host rejected: Access denied; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<[192.168.1.102]> Apr 29 15:06:15 patagon postfix/submission/smtpd[16034]: lost connection after RCPT from xxxxxxxxxxxxxx Apr 29 15:06:15 patagon postfix/submission/smtpd[16034]: disconnect from xxxxxxxxxxxxxx When I try to use authentication, the following error shows: Apr 29 15:11:23 patagon postfix/submission/smtpd[15920]: connect from xxxxxxxxxxxxx Apr 29 15:11:25 patagon dovecot: auth-worker(16206): mysql(localhost): Connected to database dbispconfig Apr 29 15:11:27 patagon postfix/submission/smtpd[15920]: warning: xxxxxxxxxxxx: SASL PLAIN authentication failed: Apr 29 15:11:41 patagon postfix/smtpd[16165]: idle timeout -- exiting
