Don’t you hate it when you send a customer or client an email, only to hear back from them that they didn’t receive it? You have to ask them if they checked their spam folder, and are embarrassed to hear that indeed, your message has been tagged with that scarlet (pinkish?) letter.
This is not good.
Since Email Center Pro is sending mail on behalf of your domain, some servers are going to think this is suspicious behavior, which is why your message may end up with the Viagra ads and real estate offers.
But if you set up a Sender Policy Framework (SPF) record, essentially telling your domain that ECP is allowed to send for you, you’ll find that your emails will get through much more reliably.
ECP help provides detailed instructions for setting up the SPF record. All you need is access to your domain’s control panel, and you should be in business.