Why send an email from the MTA always detected as spam by gmail, yahoo, etc?

For those of you who never make the MTA, whether it's using Postfix, Exim, netmail, qmail, zarafa, zimbra or the other. Maybe dah never ngalamin if sending spam emails are always detected by the receiver, why?

There are tools that can be checked ngebantu we make our mistakes where, due to factors causing our email detected as spam or junk email there are quite a lot, and later komulasi of that requirement would be a score that nentuin email us it will be detected as spam or not.

Okay, a tool for checking it at: http://www.allaboutspam.com/email-server-test/

How to use:

1. Send e-mail first to test@allaboutspam.com | subject and its content is up
2. After some time, go into http://www.allaboutspam.com/email-serve ... / index.php
3. Enter an email address that we use for sending the Email Address box then click submit
4. Nahhh, there ntar diagnosis of allaboutspam.com and also advice from him
5. Contents: Email Details, Reverse DNS Check, Check Greeting HELO, RBL (Real-time Black List) Check, BATV (Bounce Address Tag Validation) Check, SPF (Sender Policy Framework) Check, DKIM (Domain Keys Identified Mail) Check, URIBL (realtime URI Blacklist) Check, Check SpamAssassin, together Greylist Check

The more yellow or even red, the more likely it is electronic mail that we send will be detected as spam:-D

Next, please fix the yellow and red

HTH ;)