Enable submission SMTP port (587)

Applies to :

  • Plesk 10.x/11.x Windows
  • Plesk 10.x/11.x Linux


To perform this task, you need to have :

  • Plesk URL.
  • Plesk username and password.


Most Internet Service Providers are now blocking outgoing connection to port 25 on their network in an attempt to help prevent direct to MX spamming, and abuse of open proxies and relays from their dialup and broadband customers. Thus, you will not able to use the standard outgoing port (25) while you are using their network.

The mail provider has to implement a workaround to help users to configure their email client in order to utilize your SMTP server. The solution by enabling a submission port (587) on your server.


  1. Open plesk panel and login as "admin" user.
  2. On the left panel, under Server Management, click Tools & Settings.

  3. Go to Mail Server Settings, under Mail section.

  4. Tick Enable message submission to enable the alternate outgoing port. Then click OK to apply the changes.

  • 3 Users Found This Useful
Was this answer helpful?

Related Articles

Setting Up E-mail Clients

Email configuration standard We use the standard email configuration for all of our services....

About Email

Our email serviceWith our email service, you are able to accept messages using an email client...

Setting Up Outlook Express 4

Instructions Here are the steps to configure Outlook Express 4 : Launch Outlook Express. From...

How to view message headers from the email?

Introduction This article shows you how to see the email header. Headers contain tracking...

Setting up Thunderbird

Instructions Here are the steps to configure Thunderbird (This example is for Thunderbird on...