Hi, I used to have a domain running with vpopmail, qmailadmin and vqadmin. Now the owner of the domain asked to deliver his mail to another mailserver and to configure my server as a fallback MTA for that domain. E.g. IN MX 10 mail.domain-owner.com. IN MX 100 mail.mymailserver.com.
How should I setup the domain so that my server becomes a fallback and that it delivers the e-mail to the primary mailserver when it is available again (in case the primary mailserver is off-line)? Thanks for any suggestions! - Jasper