iredmail-doc/en_US/mua/_summary.md

!!! note "Quick MUA Settings"

* Login username of SMTP/POP3/IMAP services must be full email address.
* POP3 service: port 110 over STARTTLS (recommended), or port 995 with SSL.
* IMAP service: port 143 over STARTTLS (recommended), or port 993 with SSL.
* SMTP service: port 587 over STARTTLS. If you need to support old mail clients with SMTP over SSL (port 465), please check our tutorial: [Enable SMTPS service (SMTP over SSL, port 465)](https://docs.iredmail.org/enable.smtps.html).
* CalDAV and CardDAV server addresses: `https://<server>/SOGo/dav/<full email address>`