Postfix Mail Server Send to Spam Folder [closed]

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http://serverfault.com – Possible Duplicate: Best Practices for preventing you from looking like a spammer My question is why every time I send an email either through the app or php-xmailer always in the spam box and not in the inbox. I using postfix. My ip public address is This is configuration: #### STARTTTT # See /usr/share/postfix/main.cf.dist for a commented, more complete version #append_dot_mydomain = no #append_at_myorigin = no # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorig (HowTos)