Unable to connect to gmail via IMAP/POP3 with correct username/password

Question

I'm trying to connect to my Gmail account. I'm sure, that correct username/password is provided.

I'm getting following error messages:

IMAP

Rebex.Net.Imap.Login throws Rebex.Net.ImapException with following message:

"Web login required (Failure) (NO)."

POP3

Rebex.Net.Pop3.Login throws Rebex.Net.Pop3Exception with following message:

"[AUTH] Username and password not accepted."

Answer 1

Such messages are often indication of a temporarily locked-out account. It is possible that you tried logging in multiple times with wrong password or that someone has tried to guess your Gmail password, causing Gmail to lock your account.

Verify and unlock your Gmail account at http://www.google.com/accounts/DisplayUnlockCaptcha and then try connecting again.