Right, my concern is that the sites are hosted within the same webspace, and that option doesn't show for specific domains within that webspace. It is just a single tickbox. I don't want to untick that if it disables the mail service for the webspace, and it is going to be an additional expense...
Right, currently I'm running into an issue trying to email a client who has their website hosted on our Plesk VPS. I've looked at various threads and sites found through Google on the issue, but none of what I've read accurately resolves the situation I'm in, at least not without a huge and...