[imp] Block IP

[Jacky Chan]

Hi all,

I am wondering whether Horde-IMP has this function for security concerns.
I used IMP as Horde authentication application.
But I logged there are plenty login failure record generated for IMP.
And the username is obivously generated from dictionary.
And the login retry period is so short from one IP that seems to be machine
generated.
That let me believe that I was under dictionary attack.

I would like to ask IMP or Horde can deny the IP when number of login
failure over certain limit in short range? Or Horde/IMP doesn't handle,
please give me hints on this from third party.

Thanks.

Regards,
Jacky
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