On Fri, Jun 10, 2022 at 12:08 PM, aaron lane wrote:

I've not had any issues yet with Thunderbird or my IPhone.

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And you won't unless you used the "less secure apps" connection option, which you most likely didn't.  Thunderbird has been able to configure with OAUTH for Gmail for quite a while now and I suspect Apple's email client has, too, but I cannot swear to that.

The only people who will encounter issues are those who set up their accounts using the "less secure apps" option which is being eliminated.  They will have to turn on two factor authentication (if it's not already on - I think Google may have automatically set this but it's worth checking) and then generate an app specific password if they are using an email client that does not support OAUTH.  If they're using a client that does (Outlook 2016 and later, as well as 2013 if the registry tweak is done, Thunderbird, and many others) and have been using IMAP access, the best thing to do would be to nuke the account and re-create it.  There's nothing lost when you use IMAP access, which is one of the beauties of IMAP access.  Most email clients have been automatically selecting IMAP access protocol where it's available for some years now, and Gmail has had it available by default for many years now.
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Brian - Windows 10, 64-Bit, Version 21H2, Build 19044  

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