Returned E-Mail - JunkMail rejected

Email Delivery Improper configuration is the primary reason for returned mail. SMTP servers require reverse DNS lookup


When email is sent to our clients the sender ip address is checked against spam data-bases.
Blacklisted or no reverse (possibly forged) ips and hosts are not allowed to connect.  
Connections will be dropped with a 550 error.
Air America Blacklist ....

Returned to sender 550 error? "Check email header for rejected ip address"
Example: Remote host said:
550-"JunkMail rejected -
550-[]:56112 is in an RBL, see Currently Sending Spam See:

Forward Blocked E-Mail Headers To Webmaster 
Once our support team receives header information we will bypass ip address checking.
Please note Google/Gmail/Yahoo/Hotmail/Outlook/AOL mail white-listed! 
Miss Reported spam can happen to anyone.  MX Toolbox is the best tool to check your IP for problems.

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