I used to really like this, and I used it often. Then there was a period of several months when my emails started going to spam, and I had 9 customers reach out to me letting me know. I also had some emails that had metadata injected into the subject line. No idea if that was something only I could see or the recipients saw it also. I disabled this app, and none of my emails land in spam anymore. I changed nothing else...

Bummer. I bought multiple licenses and this worked well and was reliable in the past. I can't afford to risk email deliverability, so this will collect dust.