git send-email not work with normal git proxy config, proxychains is a general proxy for Linux normal shell command, but not work with git send-email.

So, basic we need tell send-email use another smtp client msmtp which compatible proxychains.

Check List

1. sudo apt-get install msmtp
2. vi ~/.msmtprc

# Example for a user configuration file
# Set default values for all following accounts.
defaults
tls on
tls_trust_file /etc/ssl/certs/ca-certificates.crt
logfile ~/msmtp.log
# My email service
account gmail
host smtp.gmail.com
port 587
from <your-gmail-id>@gmail.com
auth on
user <your-gmail-id>@gmail.com
password <your-gmail-password>
# Set a default account
account default : gmail

3. chmod 0600 ~/.msmtprc
4. sudo apt-get install proxychains
5. vi /etc/proxychains.conf

[ProxyList]
# add proxy here ...
socks5 127.0.0.1 1080

6. vi ~/.gitconfig

[sendemail]
        smtpserver = /usr/bin/msmtp

7. now enjoy proxychains git send-email --to=criu@openvz.org your-commit.patch