The spam problem is growing. With the increase in spam, there is a proliferation of technologies for blocking spam.
Five years ago, implementing a solution for e-mail is as easy as choosing your favorite MTA (Postfix, Qmail, Sendmail, Exchange Server or Lotus Domino) and configure a static IP.
Now, if you do the same (and more), it is very likely to encounter problems with e-mail address of some agency or another. AntiSPAM technology used by the receiver will decide that your spam e-mail and e-mail will be returned, or worse, land in the spam folder (and removed from the receiver without checking!)
Since none of the anti-spam technologies are dominant, are different technologies used by different e-mail server. This means that your e-mail can be considered as SPAM e-mail from different servers for different reasons. Sometimes your e-mail can be considered as SPAM from the same e-mailserver cites different reasons at different times.
If your organization is large enough, you can use the "All my other emails are fine, though, so the problem is on your side" logic and bully the other E-manager to disable all the anti-spam take.
But if the recipient is a bigger entity, the opposite view would be thrown at you ("We are receiving emails from all, so you better make your e-mail server). This is a nightmaresituation of an administrator e-mail and this is when you need to learn all the anti-spam technologies.
Usually most of the mail delivery problems caused by these anti-spam technologies.
Check HELO greetings
Reverse DNS Check
DNSBL (RBL)
SPF
Domain Keys
SpamAssassin content controls
BATV (Bounce Address Tag Validation)
Greylisting
URIBL
There are other not so widely used that technology can play in a few cases, and if youthat, Good luck!
Previously you had to do the routine tests referred to above, and as a result of the techniques above to see a problem. An online test server and solves this problem by automating the entire process. All you have to do is an email address to send a test e-mail.
Email Server receiver analyzes the e-mail servers, e-mail and its properties and provides a report with details of your e-mail server of respectall the technologies mentioned above.
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