Sending emails locked on ntlworld account

[Raypreston]

Just for the record, I am having EXACTLY the same problem sending email from my Mac client and my Samsung mobile.

[用心棒]

To confirm then, when you run the curl command previously mentioned here it produced the same result concerning certificate revocation?

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[Raypreston]

Well it actually say this at the bottom of the log:

< 421 csmtp4.tb.ukmail.iss.as9143.net cmsmtp Virgin Media has blocked your connecting IP XXXXXXXXXX Too many bad emails have been sent. Visit https://netreport.virginmedia.com/netreport Section: Email Sending Errors to request delisting
* Got unexpected smtp-server response: 421
* Closing connection 0
* TLSv1.2 (OUT), TLS alert, Client hello (1):
curl: (8) Got unexpected smtp-server response: 421

[用心棒]

See answer @Graham_A gave to your similar query here, Re: Email sending problem