Why am I interested in stuff that will never make me any money?

Another development using GPT as usual, nothing groundbreaking but
of great amusement to me.

I've just setup a LAN mailserver on an old Pi3, because I could,
and ever since the bat book days I've always been fascinated by how
email works, but how long can I keep sending emails to different
users that are all me?

The obvious answer is to create an AI mailbot, in my case
"mitsuki", which reads mitsuki's MAILDIR and at random times within
a set timeframe (two days currently) uses openai's API to write
simple Japanese emails in reply.  This will simultaneously help me
learn Japanese, and make me think I have friends, I'm a winner.

IRL I'm still a lazy bastard.
.