SMTP Service For Facebook App Developers

CritSend offers Facebook app developers reliable email delivery for app-to-user communications and other transactional messages with its full SMTP service.

CritSend Delivers App-to-User Emails

Facebook's Platform Roadmap now includes a pivotal change for Facebook Application developers – the responsibility of many app-to-user communications will lay in the hands of app developers. Facebook will soon empower developers with access to their app users' email and with that comes great responsibility. CritSend simplifies the overwhelming learning curve and ongoing maintenance that app developers will face when dealing with email delivery. We take those off your hands - Just point to our SMTP and send. CritSend combines full SMTP service with full deliverability service. Deliverability issues like blacklists, whitelisting, accreditation, authentication and reputations can even be daunting for the most expert mail server administrator.

CritSend Ensures Email Deliverability

CritSend's Deliverability Engine automatically handles compliance, authentication headers, full unsubscription management, bounce processing and more through our whitelisted servers. CritSend's filters catch and alert you of emails perceived as spam before they are sent without interrupting your messaging flow. Your mail is automatically analyzed by our Deliverability Engine, reassembled with necessary authentication and deliverability additions, then delivered to your recipient's ISP.Your legitimate transactional app messages will reach the email inboxes of your users, and you will never worry about IP blacklisting or reputation. In addition, CritSend's online analytics tracks opens, click thrus, spam folder reports, hard and soft bounces, unsubscriptions and more.

Authentication & compliance headers added to your emails
No email sending limits
View Reports and Analytics about your email and readers
Never worry about IP reputation or blacklisting
Smart spam filters stop spam without stopping your legitimate emails
Full unsubscription processing
View Reports and Analytics about your email and readers
24 hour support team
Get up and running within minutes
Full feature list here

CritSend's Quick Setup

With our enhanced SMTP relay and online Setup Wizard, you can begin delivering within minutes. Just point to us and send. Customizing your delivery, header, signature, and other options is simple with our online dashboard. Start now with your free trial of 1,000 emails.

1. Sign up and log in to CritSend's Setup Wizard
2. Point your SMTP to smtp.critsend.com Port 587
3. Start sending
See our Documentation page for advanced setup details

CritSend Scales To Your App's Success

CritSend is a pay-per-use delivery service. There are no contracts, no additional fees, you pay only for the emails you will send. At $1 per 1,000 emails our price is far below the competition. CritSend fully scales for your changing traffic needs, and our load balanced servers smoothly handle sudden increases in sending quantities.