If you do a tophosts and select Active Recipients, does that tell you anything? You may do a delivernow by recipeint host and enter the domain name to try to deliver these messages. Otherwise, I'd suggest you look in the mail_log and see if you can find an error. Sorry if this doesn't help.
I'm just guessing, but I'd bet that the unattempted recipients are all for domains which are currently marked as unreachable. When AsyncOS detects that a domain is unreachable, it doesn't attempt each and every recipient for that domain. Instead, it periodically probes the domain with just one recipient. That keeps it from wasting time on recipients that it already knows it can't deliver right now.
and when i do a tophosts all the active recipients added makes something like 5500 , so where are the rest of the active recipients.
Well, it is only the top 20 hosts in your queue. The other recipients are spread out across all the others that didn't show up in tophosts.
It looks to me like you're getting a lot of spam through your defenses, and the bogus return address domains on the spam are causing those large active recipient numbers. But that's just a guess.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...