I have multiple SMTP accounts setup but email are always replied with the default smtp account. I have to manually change that for each email I send. Instead of a single default smtp account it makes more sense that account-1 sends email through it's own smtp account not system default. Someone sends you email to bill@gmail.com and you reply through melinda@gmail.com because that's what has been set as system default is not the best choice.

Reproducible: Always

Steps to Reproduce:
1. Setup a few smtp account
2. set one as default
3. all emails are sent from default account

Actual Results:  
emails are always sent from same default account

Expected Results:  
different email account should be using their own smtp accounts.