Best practices: Sending email on behalf of users

Question

The company I work for provides testing services for the healthcare industry. As part of our services, we need to send email to our clients\' employees. Typically, these are t

Answer 1

The on-behalf-of header is the best way to do that, but you are also going to get trapped by spam filters. The best to mitigate or lessen the likelihood that you will end up in the spam filter is to implement all the industry standards around verifying your domain and mail server. As indicated in this article:

http://www.codinghorror.com/blog/2010/04/so-youd-like-to-send-some-email-through-code.html

However that is very tough to do, because you need to stay on top of SPAM standards, and abide by CAN-SPAM laws and everything else. The better bet is to use a on-demand cloud based SMTP server like this one:

https://www.postmarkapp.com

Use a company that is a domain expert in the area of sending email and has gone through all the leg work to get the highest deliverability rate. And will stay on top of the standards for you, and monitor black lists for problems.