PAUSE SYNC for each email accounts

I use Mailbird because is allowing me to have several email accounts checked in one shot. However, using metered connection this is causing me some troubles. And not only, sometimes I want to check only 2 or 3 emails accounts and not all the others (I currently have 15 emails in Mailbird). Mailbird is not allowing to stop the sync of any account, when you open the app or click to the unified account all the accounts are synching at the same time. For this reason I thought a button allowing me to put an account in PAUSE from synching would be very, very useful.
I believe several other users can find it useful too.