4.5.4. Mail server limits

The limits are the same for all users and cannot be changed.

Restrictions per IP address:

  • Number of IMAP connections — no more than 40 simultaneously.
  • Number of SMTP connections — not more than 300 per minute.
  • A maximum of 300 messages can be sent per minute or a single message can be sent to a maximum of 300 simultaneous recipients (including copies and hidden copies).
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