Every web hosting provider can employ their own specialist methods for detecting email patterns or IP addresses. The most common methods for detecting spam are as follows:
- IP Address Blacklisting - Check to see if your IP has been blacklisted by an anti spam organisation.
- Originating Domain Name - If your domain name has been previously associated with spam complaints your emails are likely to be received as spam.
- IP Reverse DNS - Ensuring that your IP address has a valid Reverse DNS record is important as this can affect email delivery.
- Keyword Filtering - If you email contains words that are commonly associated with spam the email will either be not delivered or marked as spam.
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