topic Re: Untrusted certificate in Email

Untrusted certificate

adriank — Tue, 12 Sep 2023 16:32:58 GMT

I currently cannot send emails from my ipad because the smtp.plus.net certificate is not trusted. How can I fix this?

I can receive emails OK

Re: Untrusted certificate

Browni — Tue, 12 Sep 2023 17:14:10 GMT

Have you tried using relay.plus.net instead of smtp.plus.net?

Re: Untrusted certificate

dvorak — Tue, 12 Sep 2023 20:00:52 GMT

Moderators Note

This topic has been moved from Community Feedback to Email

Re: Untrusted certificate

willcutforth — Wed, 13 Sep 2023 09:15:34 GMT

Can you tell us exactly how you are set up and send some screenshots please @adriank ?

Re: Untrusted certificate

Baldrick1 — Wed, 13 Sep 2023 09:23:02 GMT

@adriank

See https://www.plus.net/help/email-guides/how-to-set-up-plusnet-email/

Re: Untrusted certificate

adriank — Wed, 13 Sep 2023 14:15:23 GMT

changing to "relay" rather than "smtp" has fixed it for now. Do you still want screenshots?

Re: Untrusted certificate

willcutforth — Wed, 13 Sep 2023 14:44:58 GMT

@adriank I'm glad to hear it! We don't need screenshots now If you need anything else do let me know.

Re: Untrusted certificate

Townman — Thu, 28 Sep 2023 10:07:43 GMT

@willcutforth wrote:

Can you tell us exactly how you are set up and send some screenshots please @adriank ?

Will,

For clarification, all of the clues were in the first post:

Many email clients unhelpfully guess the mail server names, using smtp.*.* (though how this maps to plus.net without autoconfiguration ... is not apparent - possibly entered manually)
smtp.plus.net is a working alias for the outbound relay server so it will configure successfully
The relay.plus.net security certificate however does not have smtp.plus.net as a alias so it all falls apart at the point of attempting to send an email

This has been the case ever since email connection encryption was implemented. There have been multiple requests to have smtp.plus.net added as an alias to the certificate ... to deal with the unhelpful characteristics of many "lets make this easy" tactitics email clients.