Managed Personal Email Server Explainer

Since You Have 250,000 Email Sends Monthly You Can Sell Email Sending Service.

Monthly Email Sends 100,000 Sends 250,000 Sends Additional Info:
SendGrid .35¢ per 1000 .24¢ per 1000 Pricing for Email API plans; Marketing Campaigns plans differ.
Mailgun .35¢ per 1000 .35¢ per 1000 Additional features like dedicated IPs may affect pricing.
Sendinblue $1.24 per 1000 .92¢ per 1,000 Pricing based on email volume; unlimited contacts allowed.
Personal Email Server .35¢ per 1000 .35¢ per 1000  You can compete with the 3 largest bulk senders. Some Customers Offer Free Email Validation!

You can Package Email Validation with Bulk Email Sending!