Here log from /var/log/maillog i send email for you.
Mar 23 11:27:08 digitalprint postfix/smtpd[6110]: connect from localhost.localdomain[127.0.0.1]
Mar 23 11:27:08 digitalprint postfix/smtpd[6110]: 4B69D570128: client=localhost.localdomain[127.0.0.1]
Mar 23 11:27:08 digitalprint postfix/cleanup[6106]: 4B69D570128: message-id=<35b2d7572c1aafa38b77a0983aa83a06@digitalprint.bg>
Mar 23 11:27:08 digitalprint postfix/qmgr[10855]: 4B69D570128: from=<dimitar.rangelov@digitalprint.bg>, size=1830, nrcpt=1 (queue active)
Mar 23 11:27:08 digitalprint postfix/smtpd[6110]: disconnect from localhost.localdomain[127.0.0.1]
Mar 23 11:27:08 digitalprint amavis[5837]: (05837-04) FWD via SMTP: <dimitar.rangelov@digitalprint.bg> -> <zhb@xxx>,BODY=7BIT 250 2.0.0 Ok, i
Mar 23 11:27:08 digitalprint amavis[5837]: (05837-04) Passed CLEAN, LOCAL [127.0.0.1] [127.0.0.1] <dimitar.rangelov@digitalprint.bg> -> <zhb@xxx.
Mar 23 11:27:08 digitalprint postfix/smtp[6120]: 1F5F857013E: to=<zhb@xxx>, relay=127.0.0.1[127.0.0.1]:10024, delay=2.5, delays=0.1/0.01/0/2.
Mar 23 11:27:08 digitalprint postfix/qmgr[10855]: 1F5F857013E: removed
Mar 23 11:27:09 digitalprint postfix/smtp[6111]: certificate verification failed for aspmx.l.google.com[74.125.39.27]:25: untrusted issuer /C=US/O=Equ
Mar 23 11:27:10 digitalprint postfix/smtp[6111]: 4B69D570128: to=<zhb@xxx>, relay=aspmx.l.google.com[74.125.39.27]:25, delay=2.6, delays=0.2/
Mar 23 11:27:10 digitalprint postfix/qmgr[10855]: 4B69D570128: removed