PenTesting Email AntiVirus

[Ilici Ramirez <ilici_ramirez () yahoo com>]

Hello,

What ways do you know to pen-test email antivirus
software? 

A cool one that has been published before is to zip a
very large file that contains the same character. The
result, a very small file attached to an email could
deplete resources on the antivirus server. Do you know
any AV exploitable with this?

All the best,
Ilici

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