Postfix might be a bit more popular than Dragonfly Mail Agent. We know about 1 link to it since March 2021 and only 1 link to Dragonfly Mail Agent. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've been using dma, see if it suits you. Https://github.com/corecode/dma. Source: over 2 years ago
Read the documentation on postfix.org and/or buy one of the many available Postfix books (it really helps to understand the Postfix philosophy). Source: about 3 years ago
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