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My e-mails are not sending. "connection to SMTP server timed out." How do I get this working?

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LeAnn1
LeAnn1
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As of yesterday, I am receiving e-mails fine; however, unable to send. Everytime I try to send an e-mail, I get "Sending of message failed. The message could not be sent because the connection to SMTP server (my mail address) timed out. Try again or contact your network administrator. I received help from lunarpages (they host my domain); however, they were unable to resolve the issue. They suggested something is blocking IP, or need to update Thunderbird, or there's a firewall there... Help!!! My clients are waiting for responses to e-mails! Thank you.

As of yesterday, I am receiving e-mails fine; however, unable to send. Everytime I try to send an e-mail, I get "Sending of message failed. The message could not be sent because the connection to SMTP server (my mail address) timed out. Try again or contact your network administrator. I received help from lunarpages (they host my domain); however, they were unable to resolve the issue. They suggested something is blocking IP, or need to update Thunderbird, or there's a firewall there... Help!!! My clients are waiting for responses to e-mails! Thank you.

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Matt
Matt
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To diagnose problems with Thunderbird, try one of the following:

  • Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.
  • Restart the operating system in safe mode with Networking. This loads only the very basics needed to start your computer while enabling an Internet connection. Click on your operating system for instructions on how to start in safe mode: Windows 8, Windows 7, Windows Vista, Windows XP, OSX
If safe mode for the operating system fixes the issue, there's other software in your computer that's causing problems. Possibilities include but not limited to: AV scanning, virus/malware, background downloads such as program updates.