Oh wow, I grepped through the readme and a few pieces of code for “socket” but missed this. I’m sorry! Thanks for the clarification.

Unix sockets are slightly more efficient than TCP connections on a local system. In the case of redis, the docs note:

Depending on the platform, unix domain sockets can achieve around 50% more throughput than the TCP/IP loopback (on Linux for instance).

I think that this has been resolved since you posted this ticket ~jvc26. Could you validate?

This error happens to me constantly - every 10 minutes or so; my email server is in Romania, and I don't think that aerc deals with latency (130ms+) very gracefully currently.