Google Enforces New Security Measures for Gmail Access

Starting September 30, Gmail users must switch to more secure login methods as legacy app support ends.

Google will discontinue support for less secure apps and Google Sync for Gmail accounts.
Users must adopt OAuth or other secure access methods to avoid login errors.
The move aims to reduce the risk of unauthorized account access and improve overall security.
Affected users include those using older versions of Outlook, Apple Mail, and other third-party email clients.
Personal Gmail accounts will have IMAP access enabled over OAuth by default.