Error when trying to send/receive emails since upgrade.

I did the upgrade yesterday, and ever since then I am unable to connect and receive or send emails. I have changed nothing, it just doesn’t work. But the same credentials in a diff. email client works fine. So this is definitely specific to eM Client

Not exactly the same problem, but very similar…
After importing from TB all the SMTP POP3 etc details appeared correct and it still wouldn’t work, so in desperation I have cleared it all and entered manually - hey presto, it works OK.
So you might want to enter them again (ie delete old and create new profile)??

can you please tell us what email provider do you use?