So you finally arrived to your room. You set up your internet. Check what's up. Send a mail to your folks back home that you're OK... Error! Wrong username/password. Believe me or not - that's expected with standard email client configuration.
This is the efect of French ISP playing internet police game. To prevent potential spam, they allow you to use only their SMTP servers. The bad thing is that, at least my provider, use transparent redirection instead of blocking. This gives us the WTF of login error instead some connection error.
The solution is pretty straightforward: don't use the SMTP port. This can be done by switching your client to use SSL encryption. Note that TLS encryption will not help. It uses the standard port and then negotiates encryption with StartTLS.
Some e-mail operators don't like SSL. But you can still use TLS or unencrypted email if they opened the submission port. Just try switching the port number to 587.
If none of these work out of the box, you will have to ask your e-mail operator to open one of the options above. Switch operator if they don't. Or switch to webmail.
