Mail app stopped working "Unable to connect to email server"

[Njbrandon]

Gmail suddenly stopped working with the stock Mail app. Tried clearing cache, partition, deleting and reinstalling. Nothing worked.

 

[B. Diddy]

Just to be sure -- when you say deleting and reinstalling, you mean that you removed the Gmail account, and then added it back to the Mail app, right?

 

[Njbrandon]

Just to be sure -- when you say deleting and reinstalling, you mean that you removed the Gmail account, and then added it back to the Mail app, right?

I found that the stock Mail app works if I shut off WiFi and use 4G. The Gmail app works either way over WiFi or 4G. So the stock Mail app stopped connecting to imap.gmail.com server as of yesterdaywhen connected to WiFi for some reason.

 

[B. Diddy]

See what happens if you temporarily disable IPv6 in your router's settings (accessed by via your computer browser -- see the router manual).