Share via

Outlook's failure to verify comcast's security certificate is stopping inbound email

Anonymous
2025-04-02T00:24:12+00:00

Every time I boot up Outlook I get this message and until I select to nonetheless allow connection to the server I cannot receive my email. A comcast rep spent 1.5 hours with me trying everything he could find on Microsoft's support to remedy this. Nothing worked. I've already tried MANY times to update the certificate offered by this popup. HELP please!

__________________________________________________________________________________________

The server you are connected to is using a security certificate that cannot be verified.

Do you want to continue using this server?
Proves your identity to a remote computer
Ensures the identity of a remote compute

1.3.6.1.4.1.6449.1.2.1.3.4
2.23.140.1.2.2

Issued to: imap.email.net

Issued by: COMODO RSA Organization Validation Secure Server CA

Outlook | Windows | Classic Outlook for Windows | For home

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2025-06-12T00:27:07+00:00

    This problem was driving me crazy and the internet had all kinds of crazy suggestions: delete your browser, etc.

    This post put me on the right track.

    I have 3 email accounts all pop3 on comcast.

    BUT: when I initially set them up 2 of the 3 accounts defaulted to imap and I didn't catch it right away. When I did, I went back and changed imap to pop3 and that's when the problem started. Sure enough, when I went in and tested the email settings on the 3 accounts (email account/change/test settings), the one that was pop3 initially worked perfectly, but both accounts that had originally been imap gave me the certificate error. Apparently the original imap certificate hung around somewhere in the bowels of Win11 or Office365.

    The certificate showed the path as imap.email.comcast.net, which didn't correspond to my pop3 account and verifies my assumption about the certificate being residual from the original imap account.

    This post recommends deleting the current Outlook profile and starting a new one with new account settings. I didn't want to do that as I thought it was overkill and as a rule I don't try to fix problems by deleting things although that is sometimes the solution. Anyway, I noticed in the email account settings there is an option to Repair the account. So I tried that (email account/repair). Both of the failing accounts repaired successfully and I no longer get the certificate error.

    Worked for me - maybe it will work for you.

    Cheers!

    1 person found this answer helpful.
    0 comments
  2. Anonymous
    2025-04-02T03:06:49+00:00

    My guess would be that you are trying to reach the Comcast email server thru a route which includes a server with an expired cert. (It has nothing to do with the Certs on your PC).

    Have you verified your Comcast servers connection settings?

    https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email

    If nothing else works, you can try removing the Comcast email account from your Outlook Profile and re-adding it, or, create a whole new Outlook Profile, and go thru the Comcast account setup from scratch.

    https://support.microsoft.com/en-us/office/overview-of-outlook-email-profiles-9073a8ac-c3d6-421d-b5b9-fcedff7642fc

    0 comments