Gửi mail thông qua postfix sử dụng docker

Hiện tại mình đang sử dụng image boky/postfix để thực hiện gửi mail, nhưng bị block từ google host.

Nov 30 11:40:59 replace_host postfix/smtp[26650]: 095C2D3CA2D: host aspmx.l.google.com[74.125.23.26] said: 421-4.7.0 [xxx.xxx.xxx.xxx      15] Our system has detected that this message is 421-4.7.0 suspicious due to the very low reputation of the sending IP address. 421-4.7.0 To protect our users from spam, mail sent from your IP address has 421-4.7.0 been temporarily rate limited. Please visit 421 4.7.0  https://support.google.com/mail/answer/188131 for more information. i6si3495545pgq.207 - gsmtp (in reply to end of DATA command)
Nov 30 11:41:00 replace_host postfix/smtp[26650]: 095C2D3CA2D: to=<abc@gmail.com>, relay=alt2.aspmx.l.google.com[74.125.129.26]:25, delay=19, delays=17/0.02/1.4/0.36, dsn=4.7.0, status=deferred (host alt2.aspmx.l.google.com[74.125.129.26] said: 421-4.7.0 [xxx.xxx.xxx.xxx      15] Our system has detected that this message is 421-4.7.0 suspicious due to the very low reputation of the sending IP address. 421-4.7.0 To protect our users from spam, mail sent from your IP address has 421-4.7.0 been temporarily rate limited. Please visit 421 4.7.0  https://support.google.com/mail/answer/188131 for more information. q11si2227480jah.82 - gsmtp (in reply to end of DATA command))

Mình đã thử cài postfix trên máy host và gửi được mail bình thường. Mình cũng thử config cho phép container có thể send mail thông qua host nhưng cũng bị lỗi tương tự. Thank for help!