iOS mail send from wrong account
I have a default iCloud mail account and two gmail accounts on my iPhone and iPad. When someone sends an email to one of my gmail accounts and I hit "reply", the mail app often replies from the default iCloud account instead, which obviously confuses people. I have often accidentally replied from the wrong account. Only way to change it when I hit reply is to manually change the "from" line to the account the sender used.
I have tried deleting the g,ail accounts and setting them up again, and even changing the order they appear. Same results. The SMTP primary server settings seem to be correct. Can't figure out why this is happening. Running iOS 9.3.2. Happens on both my iPhone 6 and iPad Mini. Anyone else see this?
iPhone 6, iOS 9.3.2