Specifying account profile in MSMTP

Hey guys,

I'm using MSMTP to define 2 accounts: Work email and personal email.
If I send patches via email through Git at work, I want to use my work
SMTP server and account information. Likewise at home for personal
projects, I want to use my personal SMTP account.

I put my .gitconfig in Dropbox and I share it across all of my
machines, so I avoid putting my SMTP server information in my global
config because I'd then have to use the same account everywhere.
However, I do not define a "default" account in my MSMTP file (which
is also in dropbox, in fact my whole home directory is in there).

Is there a way to specify the MSMTP account to use at the command line
when I run `git send-email`? If not, are there other good solutions to
this problem?

If not, I might contribute an option to send-email to feed down into
MSMTP.exe so that I can specify the account to use. I'm not familiar
at all with MSMTP so I want to ask here first. Thank you!