my droplet mail server work with yahoo and gmail but send spam mails to outlook.
I did configured a mail server on ubuntu 16.04 using postfix, dovecot , rainloop . It is working perfectly with Yahoo and Gmail. I can send receive mails without having any problem. I can receive mail from outlook but My send mails goes to Junk folder in outlook. I can not understand the reason and can you please help me to sort-out this problem. appreciate your responses.