Dovecot instead of Courier?

[SH-Andre]

Hi Rob,

Switching to Dovecot would indeed be a good choice, especially in terms of resource usage.

As for NSD; making the decision whether you can change from BIND to NSD requires more consideration. NSD is to be considered a lightweight alternative for BIND. If you have a small number of DNS zones, NSD could be the better solution. However otherwise, we recommend to simply stay with BIND. Also keep in mind that NSD cannot do recursive lookups and caching (however you probably won't need that anyway).