email keeps opening last mail read

Hey there andyd13,

Thanks for reaching out to the Apple Support Communities. We understand you're having issues with your iPhone opening to the last read email when opening the Mail app, and we'd be happy to look into what's going on.

To get started, after reading an email do you return to the inbox folder before closing the Mail app, or switching to a different app? Does this issue occur every time you close and reopen the Mail app, or does it occur randomly? Does the issue seem to occur after reading a specific email?

Does restarting your iPhone seem to help with the issue, even if it's just temporary? Restart your iPhone - Apple Support

We look forward to hearing back from you.

Take care.