On 2016-03-08 Gilles Detillieux wrote:
This may be a dumb question, but have you tried deleting the settings for that mail server from the 4S, and reconfiguring it from scratch? Does the problem persist after that? It sounds like something got hosed in iOS's settings. While I haven't seen exactly this problem, I have on previous occasions seen problems go away when reconfiguring a server's settings.
Ya, we thought about that, especially with cert "memory", and have tried hosing the whole account a few times and starting from scratch. No joy.
The test to the completely new/different test server achieved the same result, anyhow.
It sure is a big mystery! When we first started fighting with this I thought the carrier was doing something weird, but now I'm convinced it's just Apple being stupid Apple (or a strangely broken phone). I won't be surprised if someone else with a 4S tries our test and it fails too.