In Thunderbird:
- press Ctrl + Shift + J to show Error Console
- in Filter Output field type mailnews
- either copy and paste the errors shown here or post a screenshot
Also in a Command Shell or Terminal run the following command:
curl -v smtps://smtps.virginmedia.com
and post the redacted output here, for example;
* Trying 212.54.56.51:465...
* Connected to smtp.virginmedia.com (212.54.56.51) port 465 (#0)
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
* CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
* Server certificate:
* subject: CN=email.virginmedia.com
* start date: Nov 9 09:50:36 2022 GMT
* expire date: Dec 11 09:50:35 2023 GMT
* subjectAltName: host "smtp.virginmedia.com" matched cert's "smtp.virginmedia.com"
* issuer: C=BE; O=GlobalSign nv-sa; CN=GlobalSign GCC R3 DV TLS CA 2020
* SSL certificate verify ok.
< 220 csmtp1.tb.ukmail.iss.as9143.net cmsmtp ESMTP server ready
> [ R E D A C T E D ]
< [ R E D A C T E D ]
< 250-HELP
< 250-AUTH LOGIN PLAIN
< 250-SIZE 52000000
< 250-ENHANCEDSTATUSCODES
< 250-PIPELINING
< 250-8BITMIME
< 250 OK
> HELP
< 214-2.0.0 This is cmsmtp ESMTP service help
214-2.0.0 This is cmsmtp ESMTP service help
< 214-2.0.0 To contact postmaster send email to postmaster@virginmedia.com.
214-2.0.0 To contact postmaster send email to postmaster@virginmedia.com.
< 214-2.0.0 For local information send email to Postmaster at your site.
214-2.0.0 For local information send email to Postmaster at your site.
< 214 2.0.0 end of HELP info
214 2.0.0 end of HELP info
* Connection #0 to host smtp.virginmedia.com left intact
NB the [ R E D A C T E D ] lines either showed the device name or its public IP Address
--
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