Trouble with IMAP User, works with POP3

Hello

When i setup a Thunderbird Client and try to connect over POP3 / SMTP it works fine.

If i use the same User /PW and Connect over IMAP / SMTP, it tells me the Username or PW is wrong.

even its 100% correct and working with POP3.

i checked IMAP Settings in the Internet Site Document and the Server Configuration and it seems to be correct, looks same as POP3 in the settings.

It also doesn’t matter if i use SSL or not.

Thunderbird also tells me that the connection itself works fine.

Anyone an idea?

regards

Tibor

Subject: did you enable IMAP on their mail file

Did you use load convert mail\usersname.nsf -e and then a -h to enable and update existing messages?