We have an astaro 220 firewall, using the SMTP proxy with no NAtting rules or packet filters. I can not get mail to flow no matter what I do. I have set the filters on low, turned off the filters, setup NAT rules, packet rules with the SMTP proxy off. I think it is a DNS problem. The old watchguard firewall deliveres mail thru fine. I have checked the MX record and the A record-everthing there is OK. has anyone ever run into this same problem.
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