Sluggish to send mail; but all is fixed

I have used Airmail 2 (and its predesessor) for over a year. It has many great features; however, it is very sluggish to send nearly every email. While it is stuck “sending” the email, one can’t begin to compose another email without causing the app to freeze up…sometimes requiring a force-quit.

***Update 3 Mai 2016
I chatted with “Brenna” from support at Airmail, and she helped me solve the problem (had to reinstall the preferences). Very happy.

Baskinase about Airmail - Lightning Fast Email, v2.6.1