Hi guys! I'm not a client of mail.baby. And to tell the truth, the first time I saw this domain from some mail logs I was checking, I even thought this could be some sources of spamming. No joke, I didn't think any serious business would use this domain as their brand.
Anyway, they should be no bad at doing their stuffs. I have been a big fan of MXRoute for many years and I trust all my emails on its service. Jarland, the owner of MXRoute, also a very experienced geek in mailing services, once told me that he also uses mail.baby as one of his backup relays. So I knew, at least mail.baby could fulfill some real world business needs.