BT Mail error with Apple update

[liz222]

I am getting an error message when loading emails on my iphone and ipad.  Seems to coincide with Apple update but could this be related to the news today about AI issues?  Email updates sporadically on my iphone and ipad with Error message.  It does update as normal on the BT website.

[Kimberlin]

Or is it actually something to do with the fact that the Apple BT Mail App hasn’t been updated for six months?

Who knows, but the BT Mail App going that long without any sort of update through multiple Apple security updates and the iOS 27 update, I wouldn’t necessarily think this is an Apple problem.

[licquorice]

Where does it say the OP is using the BT Mail app?

[Kimberlin]

Where does it say the OP isn’t using the BT Mail App?

[chrisjp]

It seems likely that the OP is using the Apple iPhone email app to access his BT email account. If this app is like the Android one, it will provide access to ANY email account not just the BT one.
If it isn't working reliably with BT email then a solution is to use another email client on the iPhone - Bluemail, Thunderbird etc.