Re: "git send-email" thru Gmail incurs few minutes delay

On Sun, Jan 3, 2016 at 3:52 PM, Andrey Utkin
[off-list ref] wrote:

After "Send this email? ([y]es|[n]o|[q]uit|[a]ll): y" prompt and
before "Password for 'smtp://XXX@gmail.com@smtp.gmail.com:587':"
prompt I always have a delay of 2-3 minutes. It is weird! "Unsafe
clients" are allowed in Gmail settings.
I experience this both with @gmail.com mailbox and with gmail-based
company domain mail.
I noticed this happening the first time several months ago.
Has anybody else experienced this? Any solution?
My git version is 2.6.4.

Tested more with fresh git version 2.7.1.380.g0fea050 (from git's git)
 # equery list '*' | grep -i smtp
dev-perl/Net-SMTP-SSL-1.30.0
mail-mta/ssmtp-2.64-r3

It seems the delay is caused by git-send-email trying to resolve
workstation's FQDN.
When I add "smtpdomain = localhost.localdomain" to [sendmail] section
in gitconfig, it proceeds immediately.
The same behavior (including workaround case) happens with
openmailbox.org and fastmail.com for me.
BTW "smtpEncryption = tls" in gitconfig seems to mean STARTTLS, so
using fastmail's TLS port 465 doesn't work at all, you need to use
587.