After installing a new ASA, upgrading to 722, inbound SMTP seemed to be ok. Went on holiday for 2 weeks, when I get back I am told that we have not received emails from Cisco, Microsoft, IBM and other large companies. I blames everyone but the ASA, because emails were coming in, it was not till I did a full debug with /25 filter that I realised the ASA was stopping SMTP from these companies. I ended up with a access-list permitting "ip any any", it made no difference.
I downgraded to 7.06, and bingo, it all works.
Either I did something wrong, I don't think so as no config changes were made after the download, email just started to come in.
Anyone experienced this?
I think it is a bug, the trouble is, all looks ok, till someone tells you they did not receive an expected mail.
If things are working with inspection disabled, then probably you are running into one of the bugs I mentioned earlier. Currently safe bet would be to have inspection disabled, till we have the release fixing the issue.
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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...