
We have been using Postmark to send transactional emails from WordPress websites using Postmark's plugin and it has help fix mail delivery issues for all sites without fail. It is easy to set up and the results are amazing. Review collected by and hosted on G2.com.
There isn't much to dislike, the pricing is fair we haven't noticed any service outages in last two years of using their services. But the muti-account/agency setup could be handled better. Review collected by and hosted on G2.com.