Outlook e-mail error (0x800CCC1A) :

[MikeBernard]

Was working fine until yesterday but now getting the following error message when I try to send an email from Outlook using my virginmedia.com account 
Task 'Bernard - Sending' reported error (0x800CCC1A) : 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'

[techweb]

Still waiting for one of the Virgin team monitoring this forum to give comment to this. We want this resolved and if it can't be resolved, an explanation as to why, what changed and why we weren't notified.

[knighthawk]

I found an article about the new security for Virgin in Feb and gave it a go.

This requires setting up an APP password in your account settings for VirginMedia, which complies to their new security, but low and behold it doesn't work.

I can't send or receive.

[knighthawk]

Tried the changes below on here and from Microsoft to default to TLS 1.2

Solved: Unable to access POP or IMAP - Virgin Media Community - 5481652

Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows - Microsoft S...

neither have worked.

Can someone from VirginMedia please respond with some answers.

Thanks

[Graham_A]

@knighthawk Unfortunately this current issue appears to be affecting email clients that do not support TLS 1.2 such as Outlook 2010.  It isn't yet clear whether VM Mail has turned off access via TLS 1.1 by design or by accident.

[knighthawk]

Thank you, that would make sense.

[knighthawk]

Also tried the following as I do have an old version of Office.

Enabling TLS 1.1 and 1.2 in Outlook on Windows 7 | Microsoft Learn

still no luck.

[al67]

@Graham_A My client uses TLS 1.2 and works with a different SMTP server that I have access to, so as I said yesterday, I wonder if the VM server now requires TLS 1.3 ...

[knighthawk]

I ran the below on virginmedia.com and it does seem to support 1.2 and 1.3

SSL Server Test: virginmedia.com (Powered by Qualys SSL Labs)

Protocols
TLS 1.3	Yes
TLS 1.2	Yes
TLS 1.1	No
TLS 1.0	No
SSL 3	No
SSL 2	No

[Graham_A]

@knighthawk Interesting.  How does that stack up with this response from a curl check:

TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (OUT), TLS alert, unknown CA (560):
* SSL certificate problem: self signed certificate in certificate chain
* Closing connection
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* Send failure: Connection was reset
* TLSv1.2 (OUT), TLS alert, unknown CA (560):
curl: (60) SSL certificate problem: self signed certificate in certificate chain
More details here: https://curl.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.

C:\Windows\system32>

________________________________
Graham
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[knighthawk]

Very strange.

I have just run the same against pop3 and smtp.virginmedia and that only supports 1.2

I think we just need a definitive answer to what has changed.

Protocols
TLS 1.3	No
TLS 1.2	Yes
TLS 1.1	No
TLS 1.0	No
SSL 3	No
SSL 2	No