Archive | Email


Focusing on one metric – an experiment

In regards to marketing, I have this tendency to be all over the place. One day I will focus on twitter ads, the next I will dabble in content marketing and after a few days give up. That is really not productive: Its harder to specialize in a marketing strategy Figuring what actually works is […]

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Postfix Multi Instance Configuration

Configure Postfix Multi Instance to send through multiple IP addresses A Postfix multi instance configuration can be very powerful when you need to scale up your outgoing email volume. Once you get your postfix server running for a while, you may see that the bottleneck is not the hardware but the rate in which you […]

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Postfix Performance Tuning – Reducing DNS latency

Making small changes to how we resolve domain names can make improve the Postfix performance and will allow you to squeeze a little more juice out of your hosts. Removing IPv6 Queries By default a postfix server works both with IPv6 and IPv4. This means that if a domain name, lets say gmail, resolves to […]

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Postfix rate limiting – Politeness goes a long way

When sending large amounts of bulk emails, it may be necessary to enforce rate limiting to prevent the ISP’s from blocking your servers. Reputation In the world of high volume senders, a key metric for detecting spammers is the IP addresses’s reputation. Building a good reputation for your servers takes time and hence patience but […]

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Dont Send Your Own Emails

Well, at least not directly from your own application servers. Most web applications send out emails, either for registration confirmation or other transactional proposes. This usually involves writing up a small handler that sends out the email directly from the local server, that is running Postfix, Sendmail or *shrug* IIS . If you are administrating […]

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