October 25, 2010

Postmark – Reliable Email Delivery For Web Developers

Postmark is an application that helps web-app developers make sure their subscriber emails are getting into their users’ inboxes without getting labeled as spam. Created by the team behind Newsberry—the email marketing application—Postmark works behind the scenes for web-app developers and handles email bounceback issues, whitelisting, ISP throttling, feedback loops, reverse DNS, and delivery monitoring, so the developers themselves don’t have to.

When you sign up for Postmark, you can send 1,000 emails without paying a dime, after which you’ll be asked to pay $1.50 for each thousand emails you send out. Confirm your business email address by creating at least one “sender signature,” and create separate servers for each application you run. Choose between using a shared server or a dedicated serve—based on how many emails you plan on sending out—drop the API code into your web-app, and you’re ready to start sending emails to all of your subscribers. Email messages sent through Postmark can always be tracked, and you can tell right away which ones are being bounced back from their recipients’ email inboxes.

Although Postmark will handle all transaction emails—which are emails that a company sends out to subscribers based on an action or event—the application
is not set up to manage bulk marketing campaigns or spam the inboxes of people whose email addresses were acquired by third-party vendors. Not only does this cut down on the amount of spam that people get in their inboxes on a daily basis, but it decreases the amount of complaints that come into Postmark and increases the odds that the important emails from web-app developers are getting where they are supposed to go. For developers looking for a better way to send automated messages to their online subscribers, Postmark is a great application that’s worth trying out.

Practical Uses:

  • Send an automated welcome email to users who’ve downloaded your web app
  • Decrease the chances of your email ending up in a user’s spam box
  • Find out instantly if your subscriber emails are being bounced
  • Advertise new web-apps to your current subscribers via email

Insider Tips:

  • Send out your first 1,000 emails for free
  • Decide between selecting a shared server or a dedicated server
  • Sign up to auto-renew your Postmark credits when they run out
  • Set up an emergency contact to be notified if you’re running low on Postmark credits

What we liked:

  • Getting signed up and started with Postmark couldn’t be easier
  • Users can get real time statistics showing the volume, bouncebacks, and spam complaints
  • Postmark’s API integration is seamless and straightforward
  • Users with an extremely high email volume can get dedicated IPs

What we didn’t like:

  • The user base for this product is limited, since only web-app developers can really take advantage of all the benefits of using Postmark


Company Info:

  • Launched: 2009
  • Privately Held
  • Headquarters: Philadelphia, Pennsylvania
  • Founded by: Wildbit, LLC
  • Web site:


  • Free for 1,000 emails
  • $1.50 for every 1,000 emails sent


  1. I like this application.
    I wont waste some of my emails by sending into spam

  2. I wonder if they can make variations of this web tool so that more people other than just web developers can use it. I think they are on to something here, but only a select group of people stand to gain from it. I hope to see them take feedback and work on it further.

  3. I love this tool – it took me less than 10 minutes to get set up and have my application talking to their server. The test run went smoothly and already customers are receiving their mail.

    Simple and focused – two great attributes Postmark exhibit with this SAAS.

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