How is Simplero's Deliverability
It's really hard to get good comparative data on that, but what I know is that we have a very good deliverability. We work with a leading email deliverability provider, SendGrid, and we have a very high reputation score with them (99%+).
As a result, we're in great standing with respect to the different mail providers that your email is going to end up with, which means there's a very high probability that your emails will go through.
In addition, we work hard to keep it that way. If you are having trouble with your deliverability check out our troubleshooting guide.
What Is the Spam Check on Emails?
We run your emails through SpamAssassin, a very popular spam ranking software, to check for known spam email red flags.
It's mostly informational, to help you stay clear of things that are going to trigger spam filters based on SpamAssassin, although if you have an exceptionally high spam score, we will refuse to send your email.
It is not a reflection of how many people reported your email as spam, it's only about how your email is being ranked by the SpamAssassin software.