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can't send Thunderbird emails

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I keep getting this message...please advise, thank you: Sending of the message failed. The message was not sent due to exceeding the allowed number of recipients. The server responded: Insufficient system storage.

I keep getting this message...please advise, thank you: Sending of the message failed. The message was not sent due to exceeding the allowed number of recipients. The server responded: Insufficient system storage.

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Your mail provider is refusing to send the email and says you are sending to to many people at once. I can not look up the limits your provider imposed because you simply do not mention their name.

Perhaps look on their web site for email limits.

The only other time I have seen this is when the SMTP server is incorrectly configured to not require a password, so as you are not logged in the limit is Zero. Check in your account settings >outgoing server (SMTP) and make sure a password is required to connect to the SMTP server and then that you know the password I guess.