[Users] Why ask for the password twice?

[Bruce Bowler]

I'm mostly curious if it was 'by design' or an oversight or something 
else...

First, my environment.  I'm running version 3.9.3-31-gc98d95 on windows 7 
pro.  I use IMAP4 for my gmail account with the receiving server set to 
imap.gmail.com and the sending server set to smtp.gmail.com.  I've moved 
over to claws recently (a couple of months ago) from sylpheed.

When I start up claws, it asks for my password.  I fully understand that.  
The first time I send mail, it asks for my password again, which given 
that I'm using gmail, is the same as the password I entered when I started 
claws.

Is there a reason (I'm sure there is, and it's probably obvious) why claws 
doesn't first try the password it already knows, and if that fails, ask 
for the other password?

Thanks!
Bruce