Webmail3 can be configured easily using domain SRV records for any mailbox.
Webmail3 authenticates provided credentials with your IMAP host server using STARTTLS/SSL and "normal-password".
To process outgoing emails, Webmail3 connects using STARTTLS/SSL and "normal-password" to your SMTP host server.
Follow these three steps to setup your domain SRV records for webmail service discovery.
Find your 'email imap and smtp hosts' on your email service provider's platform.
Enter following DNS SRV record for IMAP. Replace 'mail.example.com' with your host IMAP URL. Ports 993 (SSL) and 143 (STARTTLS) are supported.
_imaps._tcp SRV 0 1 993 mail.example.com.
Enter following DNS SRV record for SMTP. Replace 'mail.example.com' with your host SMTP URL. Ports 465 (SSL) and 587 (STARTTLS) are supported.
_submission._tcp SRV 0 1 587 mail.example.com.