IMAP
Master IMAP 143 operations
Enforce TLS, quotas, and monitoring to protect inbox access.
- Default port
- 143
- Protocol
- TCP
- Primary use
- Email client synchronization
Why IMAP 143 matters
IMAP keeps mail clients synchronized; downtime frustrates users quickly.
Immediate actions
Require STARTTLS or implicit TLS plus strong auth such as OAuth tokens.
Operational guardrails
Monitor mailbox quotas, index health, and response times for heavy folders.