You might also want to do a blacklist check for the IP that you will be using. 
	But rather than setting your own mail servers, I recommend using a professional service if email delivery is important to you. 
	Getting you emails spammed will only get your IP blacklisted from more websites.
 
	Here are some providers that have free tiers for their services and I have sorted them to my recommendation
 
	Mailgun - 10K emails / month (need cc) Sparkpost - 100K emails/month (need cc to activate, can remove later) SendGrid - Not free, but you can get 15K free emails/month for 1 year using education for github pack Amazon SES - $10/10K emails Practically Free because I only use about 3K emails per month on 3 different projects Pepipost - 100 million emails free for 1 year (Read More ) Elastic Email - 150,000 free emails per month / 5,000 free emails per day