Mailgun and Sendgrid are too expensive? How so? Mailgun offers 10k emails/month totally free, and it's $0.0005/email or less after that. Sendgrid will give you

Mailgun and Sendgrid are too expensive? How so? Mailgun offers 10k emails/month totally free, and it's $0.0005/email or less after that. Sendgrid will give you 40k emails for $10/month, or 100k emails for $20/month. If you can't afford those prices, your business has bigger problems.