POP3 and IMAP strange behaviour

[zarrelli]

Well,

it's strange. I setup a site with one email user. I can receive emails and when I access them through RoundCube, I login using user@domain.com and I can read them.

If I try to read them from any clients from outside, via POP3 or IMAP, I receive login error, using the same login and password working with RoundCube.

Both IMAP and POP3 are managed by Courier:

tcp6 0 0 *op3s *:* LISTEN 1803/couriertcpd
tcp6 0 0 *op3 *:* LISTEN 1790/couriertcpd

tcp 0 0 localhost.localdo:33740 localhost.localdo:imap2 TIME_WAIT -
tcp 0 0 localhost.localdo:33738 localhost.localdo:imap2 TIME_WAIT -
tcp6 0 0 *:imaps *:* LISTEN 1782/couriertcpd
tcp6 0 0 *:imap2 *:* LISTEN 1769/couriertcpd

I noticed that when I check email from outside, it works if I use:

login: webID_username
pass: usual_pass

There's a way to login from outside as

login: user@domain
pass: usual_pass

?

Thanks