Access Specifications (EN)

SMTP Access

• SMTP / SMTPS / SMTP over TLS (port 25)
• SMTPS (port 465)
  • TLS / STARTTLS support
• SUBMISSION (port 587)
  • TLS / STARTTLS support

Technology Notes: Postfix SMTP

Option to enabled or disable for each of the following

IMAP Access

• IMAPS (port 993)

IMAP (port 143) is disabled by default due to it being unencrypted)

Active-Sync Access

• HTTPS (port 443)

Web-Access (Webmail, Cloud Storage, Caldav, CardDav, iCal, Chat)

All access to Web services is via load balancer apps which protect inside infrastructure from mis-configured clients, as well as automatically renew SSL certificates every 3 months.

• HTTP redirects traffic to HTTPS
• HTTPS (default configuration has only TLS 1.2 enabled.  TLS 1 / TLS 1.1 optionally configurable)