Crisp allows us to use a custom helpdesk domain. Here is a tutorial to customize your domain

Video Tutorial



Technical Setup

Here are tutorials for most providers:
Cloudflare: https://support.cloudflare.com/hc/en-us/articles/200168756-How-do-I-add-a-subdomain-to-my-site-
GoDaddy: https://pl.godaddy.com/help/add-an-a-record-19238
Namecheap: https://www.namecheap.com/support/knowledgebase/article.aspx/319/2237/how-can-i-set-up-an-a-address-record-for-my-domain
Gandi: https://wiki.gandi.net/en/dns/zone/a-record
OVH: https://www.ovh.com/world/g1604.web_hosting_how_to_edit_my_dns_zone

If you are using Cloudflare DNS, make sure the "Cloudflare proxy" mode is disabled for all DNS records you added. Ensure the cloud icon is grey (disabled) and not orange (enabled). This prevents Cloudflare from rewriting the DNS records.

On most providers, if you need to configure MX mails.acme.com, you will have to configure "mails" only on the DNS provider's dashboard. (You will have to remove acme.com)
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