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

This thread was archived. Please ask a new question if you need help.

Can't send message error because connecting to SMTP failed

  • 5 replies
  • 0 have this problem
  • 1 view
  • Last reply by david

Tianya1
Tianya1
more options

Please send emails to [edited] @gmail.com because I can't receive any emails at my regular email address. The error message that I keep getting when I try to send email from my regular email account ([edited] @optimumhealthrva.com) is attached.


screenshot of your SMTP settings is attached


mail provider = Optimumhealthrva.com ISP = Xfinity firewall version = Microsoft Defender Firewall  antivirus software = Microsoft Defender Antiviris 

operating system and version = Windows 11  Thunderbird version is 115.1.0 because, when Thunderbird quit working today, I uninstalled it and downloaded a new copy hoping that would make it work.  It did not.

Please send emails to [edited] @gmail.com because I can't receive any emails at my regular email address. The error message that I keep getting when I try to send email from my regular email account ([edited] @optimumhealthrva.com) is attached. screenshot of your SMTP settings is attached mail provider = Optimumhealthrva.com ISP = Xfinity firewall version = Microsoft Defender Firewall  antivirus software = Microsoft Defender Antiviris  operating system and version = Windows 11  Thunderbird version is 115.1.0 because, when Thunderbird quit working today, I uninstalled it and downloaded a new copy hoping that would make it work.  It did not.
Attached screenshots

Modified by James

All Replies (5)

david
david
  • Top 10 Contributor
more options

You did not post your SMTP server settings.

Tianya1
Tianya1 Question owner
more options

I hope this is it.

david
david
  • Top 10 Contributor
more options

click 'account settings, scroll down the left side to 'Outgoing servers SMTP, and do a screenshot there of the server. There should be one for each account.

Tianya1
Tianya1 Question owner
more options

Hopefully, I finally gave you what you have been asking for.

david
david
  • Top 10 Contributor
more options

All looks okay, but many email providers have changed requirements for more security. i suggest a first attempt would be to change STARTTLS to SSL/TLS. This article may help: https://www.xfinity.com/support/articles/update-your-xfinity-email-settings Otherwise, I have no other suggestions.