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Thunderbird can receive, but not send emails

  • 3 replies
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  • Last reply by Matt

flin_judy
flin_judy
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I cannot send emails and always get the same error message, no matter what steps I have taken. This has been the situation for nearly 48 hours. During this time I have undertaken the following steps, as advised by Thunderbird (TB)/ Optus and Google (not in order).

Checked SMTP server settings (many times), Re-booted the Router, Uninstalled and reinstalled TB, Changed the number of Server Connections to Cache from 5, down to 1 (as suggested by the TB Notification), Tried sending a test message to my other email address on several occasions, but got the same error message. I have checked my Webmail account and can send and receive from and to my email accounts from within webmail.

As required in the TB help file, The following information is provided: SMTP settings (attached). Mail Provider is Optusnet. ISP is Firefox. Antivirus is Trend Micro Maximum Security Version 17.9. OS (details attached).

If I have neglected any required info please ask. Any assistance would be greatly appreciated.

Thank you. Flin

I cannot send emails and always get the same error message, no matter what steps I have taken. This has been the situation for nearly 48 hours. During this time I have undertaken the following steps, as advised by Thunderbird (TB)/ Optus and Google (not in order). Checked SMTP server settings (many times), Re-booted the Router, Uninstalled and reinstalled TB, Changed the number of Server Connections to Cache from 5, down to 1 (as suggested by the TB Notification), Tried sending a test message to my other email address on several occasions, but got the same error message. I have checked my Webmail account and can send and receive from and to my email accounts from within webmail. As required in the TB help file, The following information is provided: SMTP settings (attached). Mail Provider is Optusnet. ISP is Firefox. Antivirus is Trend Micro Maximum Security Version 17.9. OS (details attached). If I have neglected any required info please ask. Any assistance would be greatly appreciated. Thank you. Flin
Attached screenshots

All Replies (3)

sfhowes
sfhowes
  • Top 10 Contributor
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Try with Windows running in safe mode or temporarily remove (not disable) Trend Micro.

flin_judy
flin_judy Question owner
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Thank you for responding sfhowes. Unfortunately neither of these suggestions solved the problem. I got the exact same error message as I have for the past 48 hours each time I have tried to send an email.

Regards.

Matt
Matt
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  • Moderator
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click the fetch certificate link. What does the tab that opens say?

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