similar MX Record does already exist!

[edge]

I'm trying to add an MX record like with as host name: @
and Mailserver mail.domain.com

For some reason I keep geting a "This or a similar MX Record does already exist in this zone." error from ISPconfig!

For sure this record does not exist! (and no it's not in the trash can(s))

So.. What places in the ISPconfif DB should I look, and what tables do I need to delete/clean to get this error fixed?

[till]

Why do you want to add "@" as hostname? As far as I know, the @ sign is not allowed in hostnames as it separates the username from the domain in a URL.

[mlz]

Um, I believe @ is a wildcard, which really isn't needed in an MX record, as mx builds bottom up.

somedomain.com is default MX for that domain except subdomain.somedomain.com

subdomain.somedomain.com is MX for itself