Default eMail?

[Willster]

I’ve got several email addresses but generally try to only use one, which is set as my “default” in settings. Sometimes though my iPad selects one of the other addresses which is very annoying. I don’t want to disable the less used accounts in case someone sends me something important I wasn’t expecting. Is there some other setting I need to change. I think it may be connected to sending photos from my album but I can’t be sure. Any thoughts?