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

From: Andrey Utkin
Date: Sun Jan 03 2016 - 08:52:20 EST


After "Send this email? ([y]es|[n]o|[q]uit|[a]ll): y" prompt and
before "Password for 'smtp://XXX@xxxxxxxxx@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.

--
Bluecherry developer.
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