OPW - June 1 - We ran a quickie survey to find out what email services internet dating services use. Based on the survey results, here's the companies you should consider using.
Five companies out of seventeen internet dating companies who responded, use ReturnPath/Habeus. Feedback was all positive so they're definitely a company you should consider using. Two companies use SendGrid. Other companies that are in use with sizable dating sites are Unsubcentral, BlueHornet, United Mailsolution (now Experian CheetahMail), SPF Records and Authsmtp.com.