[Users] TLS handshake failed.

[Michael Schwendt]

On Fri, 22 Nov 2024 10:38:15 +0000, Malachi Constant wrote:

> On the "Advanced" page it is indicated that the SMTP port is 587,
> and the IMAP port is 993.  I see that on the old machine (which works)
> the SMTP port is 465.  So I changed the SMTP port on the new machine
> to 465.  This made no difference

Rather than trying to guess what to fill in, why not follow posteo's
configuration instructions?

For SMTP they require port 465 with SSL/TSL and port 587 with
STARTTLS. For IMAP they require port 993 with SSL/TSL and port 143 with
STARTTLS.

Most importantly, the server name, username and password must be entered
correctly, too.

> The thing that puzzles me is that the specifications are exactly the
> same on my account on the old laptop as on the new one.  Yet the old
> one works, and the new one doesn't.

You could remove $HOME/.claws-mail and copy it from your old laptop
before starting Claws Mail.