DKIM

DKIM is optional, but recommended as some email providers mark unsigned emails as spam. To configure DKIM, run the following commands in ./data/dkim to create new DKIM keys:

openssl genrsa -out rsa.private 1024
openssl rsa -in rsa.private -out rsa.public -pubout -outform PEM

Then, create a new TXT record at dkim._domainkey.DOMAIN_HERE with the content k=rsa; p=PUBLIC-KEY-HERE.

If you've already started SnowMail, run docker compose up -d --force-recreate to apply the changes.