I love sendy! I found it when I was looking for an email marketing solution where I didn't have to pay high monthly fees. I was previously with Mailchimp. The initial setup was a bit challenging, but after that it's very easy to manage. Especially because I use dedicated sendybay hosting. I went from paying $250 per month for email marketing to $3 on my high months.

Very easy to integrate with AWS SES and thanks to that it is very affordable.

Can send in bulk. Easy to use. Cheaper than most mailing products since it is linked with SES