Your mail server certificate is invalid error

Anonymous
2018-03-03T15:59:06+00:00

I am attempting to use Outlook on my android phone.  When I attempt to add my email account to outlook (on my phone) I get an error that says:  Your mail certificate is invalid.  Would you like to login anyway.   PLEASE HELP!!!!

Outlook | Outlook for mobile | Outlook for Android | For business

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  1. Anonymous
    2018-04-21T17:12:44+00:00

    I am seeing the exact same thing.

    This issue coincided with getting a new certificate installed on our Exchange server, but OWA works fine and all other users have no problem with their phones or ActiveSync relationships. Only issue is with this single iPhone 6Plus using the Outlook for iOS app.

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  2. Anonymous
    2018-04-15T13:58:39+00:00

    Same issue here with timewarner/spectrum.  This is really frustrating as it will once and a while work, and after a few days does this again.  Problem seemed to arrive with the beta rollout......

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  3. Anonymous
    2018-04-04T01:15:51+00:00

    I'm having the same issue.  When I press "LOGIN" the error just repeats.  My only option is to press "CANCEL".

    I've confirmed the name of the email server "mail.twc.com" 

    Here is the instruction my ISP send me.

    1. IMAP settings:
      • Account Type: IMAP
      • Incoming Mail Server mail.twc.com
      • Incoming Server —IMAP port 993
      • Outgoing Mail Server (SMTP): mail.twc.com
      • Outgoing Server — SMTP port 587
    2. Inbound & Outbound User Name:  full email address
      • johndoe@roadrunnercom
    • Inbound & Outbound Password: Email Password (same as used for TWC Web Mail)
    • SMTP Server Requires Authentication: Checked

    One item to note, the ISP support person is using Outlook for Android with no issues.  I too was using Outlook for Android on my old phone.  I just can't get this to work on my new Samsung S8

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  4. Anonymous
    2018-03-07T21:09:04+00:00

    Upon seeing the screenshot, you can either choose "CANCEL" or "LOGIN" when you encounter the "Login Error" pop-up message. We would like to know what is happening when you click "LOGIN". Are you still encountering the error message when you click "LOGIN"?

    Based on the error message that you're getting, the Outlook app cannot identify the mail server of your email account. We recommend visiting the support website of your email service provider to know the correct mail server settings of your account. We also suggest connecting your Microsoft account in the Outlook app to see if the error message will appear.

    We hope to hear from you soon.

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  5. Anonymous
    2018-03-06T22:24:13+00:00

    The attached image is what I get when I try to "connect IMAP".   When I originally go into Outlook to setup my account, it asks for all the server settings, etc.   Then it says "connect IMAP" (whether I choose auto or manual setup) and when I click "connect IMAP", this is what I get.  

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