(mutt +) msmtp problem?

[Ramiro Caso]

I use mutt (1.5.21) with msmtp (1.4.28) as MDA. Usually, everything goes 
smoothly, but every once in a while I lose network connectivity when 
sending email (I don't recall whether there is a correlation between 
this problem and my trying to send not-so-big but yet around 1mb files).

Basically, what happens in trying to send an email is:

May 16 10:01:17 **** wpa_supplicant[662]: CTRL-EVENT-DISCONNECTED 
bssid=**:**:**:**:**:** reason=0
.......
May 16 10:02:27 **** wpa_supplicant[662]: CTRL-EVENT-CONNECTED - 
Connection to **:**:**:**:**:** completed (reauth) [id=0 id_str=]
.......

Then I try again, and the same thing happens. All msmtp's log shows is:

errormsg='cannot write to TLS connection: Pipe Broken' exitcode=EX_IOERR

Any ideas?

Best,
Ramiro