[Users] Not downloading from Gmail

[Richard]

> Date: Thursday, December 08, 2016 15:04:37 -0800
> From: John Jason Jordan <johnxj at comcast.net>
>
> I have Claws Mail 3.11.1 (from the repositories) on Xubuntu 14.04,
> up to date.
> 
> I have set up three accounts, a POP3 for my comcast.net e-mail
> account, an IMAP for my university e-mail account (which uses
> Gmail), and another POP3 for a regular Gmail account. When I click
> on Get Mail Claws places all the mail into my Inbox from the
> Comcast and university accounts, but never picks up anything from
> the regular POP3 Gmail account. 
> 
> I have been using this setup for years and it always worked
> perfectly before, but lately I started noticing that I was not
> getting the mail for the POP3 Gmail account. Just now I logged in
> to this account with Firefox and was stunned to see 384 e-mails in
> the imbox. This account only gets half a dozen e-mails a day, so
> apparently the problem has been going on for some time.
> 
> I looked through the configuration for this account and couldn't see
> anything wrong. But when I looked at the log I found this:
> 
> [14:25:24] POP3> USER johnjasonj
> [14:25:24] POP3< +OK send PASS
> [14:25:24] POP3> PASS ********
> [14:25:24] POP3< -ERR [AUTH] Web login required:
> https://support.google.com/mail/answer/78754 *** error occurred on
> authentication *** Authentication failed.
> 
> Apparently this is where the problem lies, but I can't figure out
> from the above how to fix it. Can someone give me some clues?

Did you happen to "recently" change your google account to 2-factor
authentication?