Changed email on account from A to B but still sending PDF's through my old email A. How can I send PDF from email B?
Please enter your iPhone/iPad settings ->"Account&Password" and check whether your email B has been added to it.

If not, please add it to your iPhone and then send email from CamScanner as follows:

open a doc in CS and tap "email"-->PDF-->tap "From" and change it to Email B.


You can also set a default email account in iPhone/iPad settings ->"Mail" -> Default Account.