Short answer
SMTP is the protocol for *sending* mail. IMAP and POP3 collect messages from a mailbox; SMTP is what carries a message out. That split is why an account can receive perfectly while failing to send — the two use different settings.
This is a general web-hosting explanation, not specific to Traxio.
Learn more
- What is SMTP and SMTP authentication?SMTP explained: how outgoing mail is sent, why authentication is required, and the difference between your app, your server and the recipient’s server.
- Email settings for any app (IMAP, POP3 and SMTP)The server names, ports and security settings for connecting any email app to your Traxio mailbox, with what to do if the app rejects them.
- How email works: from send to inboxFollow an email from your app to the recipient’s inbox — SMTP, MX lookups, authentication checks and delivery — and see where problems happen.
Step-by-step
- Create your email address and use it everywhereBeginner · 20 min · 6 steps