Thunderbird does not run on iPhones or iPads.

Yes it does I have used it on both for years. I am running the same account on my PC, ipad and up until recently on my iphone. But I came back from holiday and was asked to sign in using my password, which I couldn't remember, so I had to reset it. There was no problem on the PC or Ipad but for some reason I can't on my iphone. So I have had to use my google gmail rather than thunderbird gmail, if that makes sense.

You may be accessing the same gmail account from each device, but you are not doing it with a Thunderbird app on your iPhone or iPad.

Would you please post a screenpic showing the app icon on your iPhone that you think is Thunderbird and/or a screenpic showing the app icon on your iPad that you think is Thunderbird? Or at least report what name is shown under those icons?

A version of Thunderbird that runs on iPhones and iPads is in progress. It has a long way to go.

I now realise you are correct. It’s just the mail app. However I am still having the same issue in that I can access my email account on my iPad but not my iPhone. Thank you for your help

What do you do and what happens on your phone?