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what is diffrent domain and hostname at .env docker-compose #742
I use mailu version 1.5.
It seems Domain parameter is used by letsencrypt and hostname is used for MX record so I put this value but I can just open the webmail with untrusted certificate, it seems letsencrypt just got ssl for smtp.domain.com not mail.domain.com
DOMAIN is used to define your mail domain name
My guess is that you want: