Common SMTP Port Numbers

Find the most common port numbers below. Hosts have a tendancy to block some of them.

Contact your host or read their documentation to make sure which ports they use.

Common SMTP ports:

  • SMTP – port 25 or 2525 or 587
  • Secure SMTP (SSL / TLS) – port 465 or 25 or 587, 2526 (Elastic Email)

Automate bounce handling (Premium users):

  • POP3 – port 110
  • IMAP – port 143
  • IMAP SSL (IMAPS) – port 993

Elastic Email

Since we use their API, you only need to fill out the following fields:

  • SMTP Hostname
  • Login
  • Password

Amazon SES

Amazon SES requires you to use the SMTP port 25, 465 (with a secure SSL) or 587.

MailPoet does not support their API.

SendGrid

You can connect via unencrypted or TLS on ports 25, 2525, and 587. You can connect via SSL on port 465.

Alternatively, you can send with their API (recommended).

The option to enable the API appears when the SMTP hostname is set to “smtp.sendgrid.net”.

SendGrid webAPI option

Mandrill

You can connect via unencrypted or TLS on ports 25, 2525, and 587. You can connect via SSL on port 465.

MailPoet does not support their API.