There is no such thing as a HostGator mail server. There is your HostGator mail server, and its name is a number: something like gator1234.hostgator.com. ...

Optimum publishes one mail hostname and six ports, and marks 143, 110 and 587 as legacy. The recommended set is mail.optimum.net on 993, 995 and 465 with SSL.

Bluehost sells two email products with two different hostnames. cPanel mail answers on your own domain; Professional Email answers on Titan. The values, ...

Spectrum publishes two different mail servers and keys them to your address domain. Roadrunner and rr.com addresses use mail.twc.com; charter.net and ...

Business email subject lines, in one screen A subject line has to survive three readers in this order: a filter, a notification strip about forty ...

A mail merge in one screen Every mail merge is the same three objects, whatever the software in front of you. Get these right and the rest is menu clicks. ...

Current Gmail and Microsoft 365 attachment limits, why an under-the-limit file still bounces, and how to read the size a recipient's server will actually ...

Phishing detection, in one screen The warning signs every guide publishes describe the phishing of ten years ago. The checks below describe what a message ...

Reporting, blocking, unsubscribing and filtering do different things, and two of them backfire on the wrong message. What actually reduces junk email, client ...

RFC 3463 defines the X.Y.Z enhanced status codes carried in SMTP replies and bounce reports. Full code list, class and subject meanings, and parsing rules.