Email address for notices and recovery



I’m trying to validate the instllation but I’m stuck with “There seem to be problems with that address”

service apache2 stop
./letsencrypt-auto certonly -a standalone -d -d --server --agree-dev-preview

How does it verify the e-mailadress?
What is going wrong?

(Running an Ubuntu on MS Azure)


Having similar issue: How is the email address provided with --email verified? For now I’m using --register-unsafely-without-email. But that’s not really what I want.

Error creating new registration :: Validation of contact failed: Server failure at resolver

The MX for is in a different domain in my case.



Please have a look at


Thanks. Exactly what I was looking for. Hope they will change this behaviour in the future …