exim mail sending process

anvar mail
LOG: MAIN
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/ exim -v -M 1Y2u8h-0002Rb-KS
delivering 1Y2u8h-0002Rb-KS
LOG: MAIN
Unfrozen by forced delivery
Connecting to gmail-smtp-in.l.google.com [64.233.171.26]:25 … connected
SMTP<> EHLO host.linuxbeginners.com
SMTP<> STARTTLS
SMTP<> EHLO host.linuxbeginners.com
SMTP<> MAIL FROM: SIZE=2555
SMTP>> RCPT TO:
SMTP>> DATA
SMTP<< 250 2.1.0 OK v37si5068329qgd.45 – gsmtp
SMTP<< 250 2.1.5 OK v37si5068329qgd.45 – gsmtp
SMTP<> writing message and terminating “.”
SMTP<> QUIT
LOG: MAIN
=> admin@linuxbeginners.org R=dkim_lookuphost T=dkim_remote_smtp H=gmail-smtp-in.l.google.com [64.233.171.26] X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 C=”250 2.0.0 OK 1419222991 v37si5068329qgd.45 – gsmtp”
LOG: MAIN
Completed