dovecot IMAP not working on iOS because of Let’s Encrypt certificate problem

So I was having an issue with the mail app in my iPhones not being able to get IMAP email from my dovecot server.
Turned out I needed to change my dovecot config from this:

ssl_key = </etc/dovecot/mail.{{ domain }}.key
ssl_cert = </etc/dovecot/mail.{{ domain }}.crt
ssl_ca = </etc/dovecot/mail.{{ domain }}.chain.pem

to this:

ssl_key = </etc/dovecot/mail.{{ domain }}.key
ssl_cert = </etc/dovecot/mail.{{ domain }}.chain.pem

JLCPCB for printed circuit boards

So in my travels recently I discovered JLCPCB. They can make custom circuit boards and their prices seem very affordable. I don’t know what other companies might be out there offering similar services but I don’t think I’ll need to look further…
Update: 2021-09-24 jj5 – also check out the service from Seeed Studio. Thanks to my mate Raz for the suggestion.

Chinese AM/FM radio kit (attempt 1)

So I got myself a 1set AM / FM stereo AM radio kit / DIY CF210SP electronic production suite. Here’s me preparing to put it together…

And here’s me failing with the surface mount integrated circuit and ruining the circuit board:


I think now it’s time to learn more about SMD soldering and to check out those who came before: CF210SP.
Here’s a picture of the PCB I ruined: