Rated 2 out of 5 stars

Mail server gives an error:
5.7.0 Failed to authorize the sender 1517494895-2z6Ljv0H5M-LZjiFfek 1517494895-cnw9fN8Bpu-LVqeibT9
Check the message and try again (translate from Russian).

Thunderbird Portable 38.7.1

What is it?

This review is for a previous version of the add-on (0.9.5). 

Hi, the error message you get is a server error. You have to check with your mail provider for the exact error. There can be many reasons for this error, but probably you've sent too many messages in a short period of time and you have to wait a bit to be able to send messages again. You can try to prevent this from happening, by setting the number of concurrent SMTP-connections to a lower value, for instance to 1 in Mail Redirect's Options.