common problem can't send emails with thunderbird

[bjdowns48]

The message below is what I receive when trying to send an email

"Cannot send the message. Verify the email address in your account properties. The server responded: 535 5.7.8 [TPG-A02] Authentication denied. User xxxx@tpg.com.au is banned from using SMTP AUTH due to previous abuse'."

I have uninstalled and reinstalled Thunderbird and reset my password with TPG.

Have been waiting for about three days to have this fixed by TPG.

I can send emails from my Post Office at TPG.

Have also rebooted modem.

[david64]

Hi @bjdowns48 . Do you have the proper userid and password in the Thunderbird sending settings?

Send an email to postmaster@tpg.com.au detailing your problem. Date, time of error, sender and recipient.

[plumptonparish]

We've had this problem recently as well. I have checked the credentials work on the tpg.com.au Post Office, and it works.
I then entered the same credentials in Thunderbird, and still get the authentication error. I have a feeling it's due to the latest Thunderbird update switching TLS version, which is may not be supported by TPG mailbox.
I've since switched to using Windows Mail App.

[david64]

Hi @plumptonparish . Regarding Thunderbird and TLS, there are config changes that make TB accept the backlevel TLS used by TPG. Read the part by David1010.

https://community.tpg.com.au/t5/Broadband-Internet/TPG-email-account-inaccessible-with-Thunderbird-7...