| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| mailchimp.com | Not Listed | Open | |
| maileworld.com | Not Listed | Open | |
| mailinblack.com | Not Listed | Open | |
| mailmunch.com | Not Listed | Open | |
| mailpoet.com | Not Listed | Open | |
| mailsboxes.com | Not Listed | Open | |
| mailtracer.nl | Not Listed | Open | |
| mymainsqueeze.com | United States | Open | |
| mainsqueezeworld.com | Not Listed | Open | |
| mainzoo.de | Multiple | Open |