Ironport ESA message size overhead?

[RSteveKadish]

Hi all,

Does the Ironport ESA add any overhead to a message that would inflate the size? For instance, if a message enters the processing queue at 15Mb, is it going to be (noticeably) larger by the time it hits our Exchange server?

Thanks,

Steve

Sent from Cisco Technical Support iPad App

[Enrico Werner · Accepted solution]

Hi,

the appliance does add a few headers to the  message e.g. X-IronPort-Anti-Spam, X-IronPort-Anti-Virus headers. If  configured, disclaimers are being added too. Since they are all small in  size, the size of the message will not noticably be larger. The appliance functions rather as a gateway passing through messages without much alternation.

Regards,

Enrico

[RSteveKadish]

Hi Enrico,

Thanks very much for the response.

- Steve