We recently migrated servers and are having problems with deliverability.
The server uses MailEnable. We have several addresses that we use to redistribute to multiple users (e.g. urgent@ourdomain.com forwards to tech1@ourdomain.com, tech2@ourdomain.com, tech3@ourdomain.com, and outsidetech@otherdomain.com) to improve response times.
The forwarding works fine when outside users send to urgent@ourdomain.com.
However, when anyone within our organization sends to that address, no recipients also within our organization (including the sender if also on the recipient list) get the message. Outside recipients do get the message.
We checked SPF/DMARC/DKIM and everything seems OK. We are a large enterprise so I checked with our email team who said they configured perimeter devices to reject messages that claim to come from within our domain (sender from ourdomain.com) but appear to come from an outside server. OK, but they also didn't sound very sure that they knew what they were talking about.
This is causing major operational issues for us.
In addition to a mailbox with forwarding, we tried configuring as a MailEnable "group", and we tried configuring as a MailEnable "list" (including available options for "Send From - List address (change header and envelope)". Nothing gets through.
We don't really care who the messages appear to come from - although being able to hit reply or reply all and get back to the original sender would be nice. We thought the list option above would work but no luck.
Do we have any options? Advice on connecting with a pro who can help us (does not have to be free)? Would there be a way to create a script that processes messages and creates a new one, appearing to come from our email domain, to send to all recipients (but isn't that what the list should be doing)?
We are (obviously) not email server experts, although we are developers. Any suggestions quite welcome.
