I'm trying to send an email from GMail to an Exchange server inside a network secured by an ASA 5510 running version 7.22.
As soon as the email gets send from GMail (webmail) directly everything works fine. But as soon as the user is using the Outlook client to connect to GMail and sends an email, the mail gets dropped on the esmtp inspection rule.
If I remove the esmtp inspection the mail goes through.
Can anyone tell me why the email gets dropped when sent via GMail using Outlook and why the email passes when sent via GMail webmail?
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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...