Sender Verify or Callback Verification is an anti-spam measure which checks that the “sending” address exists at the incoming mail server for the sending domain.
When a domain is added to a cPanel based server (this could be an addon domain, a parked domain, or a full cPanel account) it thinks of its self as the only server tied to the domain. In terms of email this means that the Rochen server will not do an external lookup to find a 3rd party email host.
Often Rochen customers will develop a new site for one of their clients whilst the client’s domain itself points to another host. In these cases a “550 Sender verify failed” error is likely to be seen when trying to send emails to the client’s externally hosted domain.
In the above cases the following solutions are available:
1. Amending the MX records using the “Edit MX Record” option within cPanel for the domain *not* pointing to the Rochen server to the MX records provided by the 3rd party host. The “remote” delivery option should be selected. Both steps noted are required.
When the nameservers are amended to point to Rochen you would need to remove the 3rd party host MX records and add a new record pointing to “domain.com” and set the priority as 0. The “local” delivery option should be selected.
2. When adding the domain use an alternative domain name. When you are ready to amend the nameservers to point to Rochen simply open a ticket and ask us to “rename” the domain and retain all data / settings etc.
If you receive a Sender Verify error and your circumstances do not fit above then please open a ticket.