Email, Messaging, & Video Calls > Email What Are the FastMail SMTP Server Settings? The FastMail server settings for sending email By Heinz Tschabitscher Heinz Tschabitscher Writer University of Vienna A former freelance contributor who has reviewed hundreds of email programs and services since 1997. lifewire's editorial guidelines Updated on April 12, 2019 Tweet Share Email FastMail Tweet Share Email Email Yahoo! Mail Gmail 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.comFastMail SMTP user name: Your full FastMail email address (including "@fastmail.fm", for instance, or your specific domain name)FastMail SMTP password: Your FastMail passwordFastMail 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. Was this page helpful? Thanks for letting us know! Get the Latest Tech News Delivered Every Day Email Address Sign up There was an error. Please try again. You're in! Thanks for signing up. There was an error. Please try again. Thank you for signing up! Tell us why! Other Not enough details Hard to understand Submit