I have an old (original) iPad mini running iOS 9.3.5 (the latest it will support).
Until mid 2018 this was my main device, now superseded.
I recently tried to use it and some of my mail accounts do not work. My hosting company has changed the mail servers, but even though I updated these I cannot get Mail to work, although it works on my newer iPad.
The problem seems to be that SSL will not work, although it does on my newer iPad running latest iPadOS.
If I turn SSL off it works!
I have created an email account on vivaldi.net which seems to work OK with SSL.
Is there any reason SSL won't work on the older model?
Are there any certificates etc that should be updated?