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…

Hi there, does this help? [afbeelding] Connection to the POP3 server is failing with an authentication error. Please check your POP3 settings Support I recommend turning on 2FA on the account and setting up an App Password for Discourse. The policy change is about the “all…

No, that does not help. I have had the “app password with 2FA” implemented since January. It is the app password with 2FA that has stopped working. Any other suggestions?

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

I retested email reply system this morning an now it is working. No changes. Nothing net new or different other than upgrade. We will see if it throws another error code.

Gmail POP3 Polling mislukt na upgrade naar 3.5.0.beta8-dev

Ondersteuning

NateDhaliwal (Nate Dhaliwal) 6 juli 2025 om 03:56 2

Hi there, does this help?

Topic		Antwoorden	Weergaven
Connection to the POP3 server is failing with an authentication error. Please check your POP3 settings Support	6	4297	26 juli 2022
Gmail POP3 needs an app password nowadays Support	2	958	9 juni 2022
Gmail POP3 authentication failed — switch to application password Support	6	1384	22 maart 2019
POP3 polling stopped working Self-hosting hosting	20	2958	12 november 2025
Email polling error with Google Apps Support	11	2633	25 juli 2016

Gmail POP3 Polling mislukt na upgrade naar 3.5.0.beta8-dev

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