What Are the FastMail SMTP Settings?

The FastMail Server Settings for Sending Email

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Looking for the FastMail SMTP server settings for sending mail? We have them!

The FastMail SMTP server settings for sending mail through FastMail from any email program are:

  • FastMail SMTP server address: mail.messagingengine.com
  • FastMail SMTP user name: Your full FastMail email address (including "@fastmail.fm", for instance, or your specific domain name)
  • FastMail SMTP password: Your FastMail password
  • FastMail SMTP port: 465 (alternative: 587)
  • FastMail SMTP TLS/SSL required: yes (with port 587: no)
  • FastMail SMTP STARTTLS required: no (with port 587: yes)

FastMail SMTP does not work with legacy guest and member accounts; use your ISP's or a different free email service's SMTP server in this case.