SMTP is an abbreviation for Simple Mail Transfer Protocol, a data transmission format used to send email. The most commonly used SMTP Port is 25. However, it has become increasingly common for internet service providers to block outgoing SMTP traffic on Port 25, necessitating the use of alternate ports for outgoing email.
Alternate SMTP Port 587 is available to all domains on our Grid hosting platform. You simply need to edit your email client configuration to use Port 587. Please see the following article for the walkthrough on your email client.
SMTP Port 587 is enabled by default on all DV and DV 4.0 services running Plesk 11.0 or later.
If you are running a DV 4.0 with Plesk 10.x, you may need to upgrade to the latest version of Plesk or manually enable Port 587 on your server using the instructions below.
- Log into Plesk.
- Click the Server tab.
- Click Mail Server Settings.
- Check the box labelled Enable message submission.
- Click OK.
You will need to configure your email software to use this port. Our third-party email application walkthroughs will show you how to configure the email client to use Port 587.