The complete revamp of one of my older and abandoned applications, MailPredator is a simple and efficient mass emailing tool.

Features:

[*]Detailed settings for the message body like HTML, Reply-to address, spoofing and all that stuff
[*]Detailed settings for the SMTP connection
[*]Detailed settings for the sending system
[*]Email scraper
[*]Most emails to inbox (from my tests 100% to inbox)
[*]Option to play a sound when job is finished
[*]And others...

Important notice:

[*]You can spoof the email, but sometimes you will get your email moved to spam if you use things like verify@PayPal.com... Sometimes it does work, sometimes it doesn't.
[*]Delay and timeout are tricky, play with them with caution, if you put wrong values the emails won't go, the defaults I inserted are good


Download link: http://adrenalinetech.xyz/downloads/MailPredator/
I can assure that the app is clean, if you have any doubts run it in your VM, I don't care.
VT Scan so you don't pee your pants: https://virustotal.com/en/file/1b666acfc579064301690036ea2b390d0717e3d847c633d7aae50e14ddad3579/analysis/1494325045/