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Re: Server Error 421 Can't Send Emails

I too am experiencing this on Outlook and Android, why is Virgin blocking us from sending emails all of a sudden and without letting us know they've been fiddling? I've attempted the solutions, I've used the reporting form only to get an auto-response that the form is only to report spam.

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Re: Server Error 421 Can't Send Emails

In the original thread posted to here, Solved: Server Error 421 Can't Send Emails - Virgin Media Community - 4848415, the issue was:

Server Error: 421
Server Response: 421 cmsmtp Virgin Media has blocked your connecting IP Too many bad emails have been sent.

If you are seeing the same then go to and:

  • select an abuse type of Email Sending Errors from drop down list
  • select an abuse form of Other from drop down list
  • paste the error message shown in the curl command output but not the command itself into the Log Evidence area
  • enter your name into My name field
  • enter your email address into Email address field
  • select Submit button

Should de-listing not occur then post back here to have the forum team investigate further; until then use webmail.

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