@ chaosmonk: Thank you for trying to help! >>Have you tried and run into any particular problems?
Yes, I have.
And my attempts have always finished by receiving messages like these three:
! Username or password invalid
! Configuration could not be verified - is the username or password
wrong?
Login Failed
Login to server imap.mail.yahoo.com failed
Enter New Pasword - Cancel - Retry
Icedove
Connection to server imap.mail.yahoo.com timed out.
Thank you for your time!
