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Server Settings related to message saying " too many messages sent to this address ......
3rd post - it would be nice to get a response. I cannot send emaIL FROM THIS WIN 10 FULLY UPDated APP. The error message as above appears all the time (and does not cancel after 1 hour or whatever). Email can be sent using the same smtp settings from various Android devices. Forum suggestions do not cure the problem.
This, along with all the other annoying glitches within T'bird, seem to be forcing me to abandon using T'bird after many, many years. Shame.