• Just SMTP allows you to set up mail delivery via SMTP.
• Input your server, user, password data and you’re good to go.
• This plugin doesn’t add a top-level menu item, has no ads, nags or other clutter.
• Just SMTP does just that: SMTP.

What this plugin does not provide

• Mail delivery without SMTP authorization (i.e. without username and password). You shouldn’t want to anyway.
• Mail delivery without TLS or SSL encryption. That’s just not a thing anymore.
• Mail delivery via Exchange, Google Workspace or similar services that require more complex authorization.
• Error logging or any sophisticated debugging. It does have a mail tester though.