This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Hierdie gesprek is in die argief. Vra asseblief 'n nuwe vraag as jy hulp nodig het.

Unable to send emails from Thunderbird. Able to receive but not send out. Shaw is the ISP provider.

  • 1 antwoord
  • 1 het hierdie probleem
  • 1 view
  • Laaste antwoord deur sfhowes

graemeegan
graemeegan
more options

I get this error message when I try to send emails.

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4004a.ext.cloudfilter.net cmsmtp 38.26.17.175 blocked. AUP#DNS.

Thank you! Graeme

I get this error message when I try to send emails. Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4004a.ext.cloudfilter.net cmsmtp 38.26.17.175 blocked. AUP#DNS. Thank you! Graeme

All Replies (1)

sfhowes
sfhowes
  • Top 10 Contributor
more options

Don't have a definite fix, but there's some worthwhile reading here:

https://support.shaw.ca/t5/internet-discussions/shaw-cloudfilter-blocking-ip-when-using-a-3rd-party-isp/td-p/39468

https://support.shaw.ca/t5/internet-discussions/cannot-send-email-via-smtp-appears-to-be-shaw-s-cloudfilter/td-p/45816