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New sending domains do not need an MX record. They verify with CNAME records only, so a DNS host that blocks custom MX records, or a subdomain that already has one, is not a problem. If your domain page asks for an MX record, the domain uses an older record set, and you have three ways around it.

First, check where the MX record goes

The MX record Sequenzy asks for belongs on a subdomain such as send.yourdomain.com, never on yourdomain.com itself. It handles bounces and does not change where your normal mail is delivered, so your Google Workspace or Microsoft 365 mailbox keeps working. The most common mistake is adding it to the root domain. Check the Name column on the domain page and enter exactly that name.

If your DNS host will not accept it

Some hosts refuse an MX record on a subdomain, for example Namecheap while email forwarding is on.
  1. Upgrade the domain’s records. If the domain page shows Upgrade DNS records, run it. The upgraded set replaces the MX and SPF records with CNAMEs. Sending is not interrupted while you switch.
  2. Add the domain again. A domain you add today gets the CNAME record set. Delete the domain in Sequenzy and add it again.
  3. Message support. If neither option is available, we can set the domain up for you.

If the name is already used by another service

When you add a domain, open Advanced options and change Return path to a different label, for example mail instead of the default. Sequenzy then asks for records at that name. The return path can only be chosen when the domain is added or during Upgrade DNS records, not edited afterwards.

Without the dashboard

See Upgrade Website DNS.