These days if your message is not formatted with best practices in mind or it contains words or phrases that might trip the SPAM filters, it may not even get into your clients mail server let alone into their inbox. There are so many roadblocks and potholes along the way that legitimate opt-in email can get blocked or placed right into your clients SPAM folder regardless of how long your relationship with your client or customer goes back.
At Boomerang we see a lot of email messages and we know what works and what is likely to trip up and be rejected. We use the latest tools and techniques to flag and fix problem areas in your messages before they go out so that your message has the best chance of arriving unscathed.