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.

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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

can't send any messages since upgrade to thunderbird 45.4.0

  • 3 valiny
  • 2 manana an'ity olana ity
  • 1 view
  • Valiny farany nomen'i Matt

more options

I can not currently send email from my btinternet.com email or any of the sub accounts all the ports and settings look fine and I can send from the yahoo log on page and the btmail page however I get the same error message every time The message could not be sent because the connection to Outgoing server (SMTP) smtp.mail.yahoo.com was lost in the middle of the transaction. Try again I am receiving emails fine I have tried turning my firewall off completely and following all the trouble shooting for McAfee and non of the issues or add ons exist on my email I have tried using the recommended 2 outgoing ports of 465 and 587 - 465 will not even connect to the server and 587 produces the above error message

I can not currently send email from my btinternet.com email or any of the sub accounts all the ports and settings look fine and I can send from the yahoo log on page and the btmail page however I get the same error message every time The message could not be sent because the connection to Outgoing server (SMTP) smtp.mail.yahoo.com was lost in the middle of the transaction. Try again I am receiving emails fine I have tried turning my firewall off completely and following all the trouble shooting for McAfee and non of the issues or add ons exist on my email I have tried using the recommended 2 outgoing ports of 465 and 587 - 465 will not even connect to the server and 587 produces the above error message

All Replies (3)

more options

Tried all this no joy tried contacting bt no help say don't support thunderbird

more options

have you tried uninstalling McAfee? It is a know mail mangler.