2014/04/24 by Jérôme Gays.
PowerMTA High Volume Sending and Email Authentication
So you decided to take the path of in-house deliverability (see our article regarding this topic), but there is one more thing to think about: Which is the sending solution to pick out from the others? By Postmastery, we made up our mind and decided — as well as becoming both an authorized retailer and […]
2010/01/01 by Maarten Oelering.
Why I chose a commercial grade MTA
For sending emails, there is a wealth of solutions. On the open source side, there is Sendmail, Qmail, Exim and Postfix. Then there are a number of commercial MTAs available, at different price levels. The most well known vendors are Message Systems, Port25 and StrongMail. Postfix is a popular open source MTA thanks to it’s […]
Categories: Authentication, General, Postfix, PowerMTA
2010/01/01 by Maarten Oelering.
PowerMTA Email Relay Solutions for Marketing
If you are a sender providing email relay services, how do you make sure that bounces and complaints are properly handled? Often the emails are generated by applications that hand-off the delivery to a relay service but have no means for processing returning bounces. This was also a question at 1-2-1 Marketing, a Texas based […]
Categories: Case Studies, General, PowerMTA
2010/01/01 by Maarten Oelering.
Interspire bounce processing add-on for PowerMTA
Interspire is perhaps the most popular email marketing tool. Used with PowerMTA, it becomes a powerful and complete email solution. But the two were not integrated with regard to bounce processing. Until now. Postmastery regularly set up turn-key email systems based on Interspire and PowerMTA. The systems were complemented by a POP/IMAP server so bounce […]
2010/01/01 by Maarten Oelering.
DKIM recipe for PowerMTA
DomainKeys, and it’s successor DKIM, are important email authentication techniques. Based on cryptography, they are more secure than SPF and Sender ID. With DomainKeys/DKIM the integrity of the content is also protected and authentication does not break when emails are being forwarded. DomainKeys/DKIM is used by large webmail providers such as Google, Yahoo and AOL. […]
2010/01/01 by Maarten Oelering.
Hotmail throttling and PowerMTA
Windows Live Hotmail is famous for throttling senders based on their IP reputation. The following two SMTP errors might be familiar: 421 PR(ct1) The mail server IP connecting to Windows Live Hotmail server has exceeded the connection limit allowed. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. For […]