Many users have upgraded to GreenArrow after outgrowing open source MTAs such as Exim, Postfix, qmail or Sendmail

Open source is great for many things, and we use it all the time, but the available open source Mail Transfer Agents (MTAs) are not built for the needs of high-volume or deliverabilty-conscious senders.

Customers who have upgraded to GreenArrow from open source MTAs have been delighted to finally have a product built specifically for their needs.

Here are some of the main reasons they upgraded:

VOLUME

Open source Mail Transfer Agents (MTAs) often max out between 20 and 30 thousand messages per hour. GreenArrow can send 300,000 messages per hour—more than ten times as fast.

Companies using open source MTAs often scale up by deploying additional servers. A single license of GreenArrow is a cost-effective option compared to one or two additional servers, not to mention the hassle of maintaining several servers.

DELIVERABILITY TOOLS

Open source MTAs don't contain most or all of GreenArrow Engine's deliverability enhancing features —IP segmentation, connection throttling, bounce processing, feedback loop processing, DKIM email authentication, and reporting on what ISPs are blocking your email.

We've seen people build some of these tools themselves or cobble together solutions from various sources—but how much is your time worth?

More importantly, how much is reaching your entire email list worth? Without the right tools it's not unusual to be blocked at several ISPs and never even know it. The price of GreenArrow is small compared to the cost of not reaching a large percentage of your subscribers in lost sales or lost response.

EASE-OF-USE

GreenArrow includes a simple yet powerful web-based configuration interface, so you don't have to spend time searching for the right configuration parameter in a cryptic configuration file. And GreenArrow's web-based reporting shows you the data you need and reveals the trends, so you don't have to comb through log files.

PEACE-OF-MIND

It's not uncommon for us to hear of open source MTAs that choke in the middle of a campaign and require active queue management to keep running. Don't live with the fear of your campaign stalling or stay up nights to babysit your server—get a solution designed to handle high volume.

THE PRICE OF YOUR TIME

It all comes down to your time. GreenArrow can protect you from wasting precious time trying to extend an open source MTA beyond its core capabilities while giving you a better software infrastructure.