I have had Gmail POP3 polling running since January using the App password method. No issues and all has been going great. I upgraded from 3.5.0.beta7-dev to 3.5.0.beta8-dev. I immediately received the following error in my admin panel: Connection to the POP3 server is failing with an authenticati…

Gmail POP3 Polling Failing after Upgrade to 3.5.0.beta8-dev

NateDhaliwal (Nate Dhaliwal) July 6, 2025, 12:00pm 4

Anything in /logs, or any errors in the mail account?
Also, does anything in here help?

Topic		Replies	Views
Connection to the POP3 server is failing with an authentication error. Please check your POP3 settings Support	6	4114	July 26, 2022
Gmail POP3 needs an app password nowadays Support	2	919	June 9, 2022
POP3 polling stopped working Support	18	2814	June 30, 2020
Gmail POP3 authentication failed — switch to application password Support	6	1347	March 22, 2019
Email polling error with Google Apps Support	11	2590	July 25, 2016