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 doc 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

We actually use their API which uses port 80, which makes it a lot easier.

You only need to put fill out the fields: SMTP Hostname, Login and Password.

Amazon SES

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

MailPoet doesn’t support their API, on port 80.

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 also send with the API, which we recommend.

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

Mandrill

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

MailPoet doesn’t support their API, on port 80.

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