Hello. I have been using Pegasus Mail 4.80 on Windows 11 since some time now without any problems. But since yesterday, I can no longer send emails. I can still receive emails though.
Message I get is following: 'SMTP Network or Protocol Error sending mail. Protocol error: The server has unexpectedly refused or failed a request made by Pegasus Mail.'
Anything I could do to solve the problem?
Many thanks in advance for your help.

For figuring out details a log would help: Go To Tools > Internet options: At the bottom of the first page named General you can enable it, the files will be written to a subdirectory of your mailbox, the path of which can be found via Help > About Pegasus Mail > Info button. Please note: Before posting anything from the log file you need to remove the lines containing your address and password: Although looking unreadable they can easily be decoded using respective decoding tools, they are not encrypted! For more details see Pegasus Mail's online help to be opened by the respective Help button of the General tab.