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How to enable / disable submission port 587 in Plesk

Kuzma Ivanov

Updated October 22, 2025 08:59

kb: how-to Plesk for Linux kb: auxiliary

Applicable to:

Plesk for Linux
Plesk for Windows

Question

How to enable / disable submission port 587 in on a Plesk server?

Resolution

Enabling port 587 via Plesk interface

Log in to Plesk.
Go to Tools & Settings > Mail Server Settings.
Check / uncheck the setting Enable SMTP service on port 587 on all IP addresses.
Apply the changes.

Enabling port 587 via command-line interface

Connect to your Plesk server via SSH (Linux) / RDP (Windows Server).
Run the command:

# plesk bin mailserver --set-message-submission true

Note: On Windows Server, start a command prompt as an Administrator.

To disable submission port 587, run:

# plesk bin mailserver --set-message-submission false

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