AWS_SES_USERNAME (required): Username of the identity account
AWS_SES_PASSWORD (required): Password of the identify account
AWS_SES_HOST (optional): The server name of AWS SES. The default is: email-smtp.us-west-2.amazonaws.com
AWS_SES_PORT (optional): Port of the above server. It could be 25, 465 or 587 The default is 587
MY_NETWORKS (optional): which network(s) allowed to connect to this postfix. The default is all private networks: 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/16 172.16.0.0/12 10.0.0.0/8
POSTFIX_HOST (optional): name of this postfix host. The default is localhost