We are currently running into problems with some of our customers, because mail from addresses hosted on the same box gets incorrectly classified as spam. This morning we had an issue with mail from one person sending an email to another person (same domain) getting classified as spam (score of 5.7-5.9 mostly coming from SORBS (2.0) and NJABL (1.7)).
I turned RBL off in the global config file and now the customer receives viagra mails...
I understand that you cannot have a spam filter with a 100% correct hits, but there has to be a way to automatically add all domains / email addresses hosted on my box to a global whitelist.
I cannot find such a feature. Would it be easy to write a plugin for ISPConfig to do that? Is such a feature planned for ISPC 3?