iredmail-doc/en_US/mua/_summary.md
Zhang Huangbin 9394bd17a4 Sync upgrade tutorials:
* Web server: Enable HSTS (HTTP Strict Transport Security) support.
* SOGo: Fix improper settings in Apache/Nginx config file.

New: en_US/troubleshooting/debug.roundcubemail.md.
Improve en_US/overview/0-used.components.md: mention how to check software versions.
2015-12-03 09:30:45 +08:00

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POP3 service: port 110 over TLS (recommended), or port 995 with SSL.

IMAP service: port 143 over TLS (recommended), or port 993 with SSL.

SMTP service: port 587 over TLS.