Thunderbird will receive but not send messages.

I have been using Thunderbird for a year with no problems until now. It seemed to start right after I downloaded a Thunderbird update. The server and port settings seem right. I do not know what else to check. Should I re-enter my account password?

''michaelbenoff [[#question-1036564|said]]''
<blockquote>
I have been using Thunderbird for a year with no problems until now. It seemed to start right after I downloaded a Thunderbird update. The server and port settings seem right. I do not know what else to check. Should I re-enter my account password?
</blockquote>
''Matt [[#answer-665710|said]]''
<blockquote>
what is the error message?
</blockquote>
Error message as follows when trying to send message: "Message could not be sent using SMTP server for an unknown reason. Please verify that your SMTP server setting are correct." I have done this a number of times. Settings seem correct and I keep getting this message. Any ideas would be most welcome!!

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