hi, Norman :
Thank you very much for your quick and professional answers.
Your answers to issue 3 and issue 4 are really match my questions, I
will do some test later.
for issue1 and issue 2, I just list them to make things more clear, I
already know how to implement them.
Thank you and best wishes.
Norman <[EMAIL PROTECTED]> 写道：
[EMAIL PROTECTED] schrieb:
> Hi, all:
> Can james work with a close mailing list to anti-spam?
> Recently I am tring to use James in a speical web project, and I want to
> develop some codes to make James server satisfy my requirement.
>
> the detail are:
> 1) James server will act as a mailing list server, together with Mysql.(many
> mailing list account, assume one is [EMAIL PROTECTED])
> 2) user can not subscribe one mailing list by sending email to
> mailing-list-email-address, the only way to subscribe is login a related web
> site,
> and click some button. and the website will add this user (with a valid
> internet email address) to Mysql database.
> 3)When any one send email to any mailing list account, such as [EMAIL
> PROTECTED], before receive the whole email, I want to check the email header,
> if the email-sender is not in the allow list, I want the server to reject the
> email.( send a feed back notice, or simply just drop this email), and not
> receive the whole email. In my bisiness logic, any email address that not in
> the allow list is a spam email, and the allow list will be cached in the
> memory so don't need to consider the allow-list-efficency.
> 4) when any one send a big email to any mailing list account, before receive
> the whole email, I want to check the email size, if it is bigger than what I
> want, I want the server to send a feedback notice "too big email", and not
> receive the whole email. (to save bandwidth).
>
> Is it possible to update James server to satisfy above requirement?
> if it is possible, which part of James-server can I begin with?
>
> I know we can add a custom Mailet in the James server, but when the mailet is
> executed, although I can do above logic(like drop spam email), but it is a
> little late, because whole email already received by James and the bandwidth
> has been wasted.
>
> Why I need such strange requirement is because:
> In my project, there are many mailing list account, and each mailing list's
> traffic will be high, so I need to refuse all the unknown email address and
> too-big email to save bandwidth.
>
> I hope any one can give me help or any ideas.
>
> Thank you very much.
>
> tingxuezheemail-zhuce
>
>
Hi,
im not sure about 1 and 2 ( im never tried the ML features) but 3,4 are
possible. Like you said you can just create a costum mailet.
3) If you want to check it on the SMTP-level ( to safe bandwith etc.)
you could extend the org.apache.james.smtpserver.DataCmdHandler and use
a costum InputStream to parse the header as soon as possible.
4) I think this is allready possible by setting the mxmessage size in
the smtpserver config. If you need something special i whould look in
the org.apache.james.smtpserver.DataCmdHandler and the
org.apache.james.smtpserver.SizeLimitedInputStream
If its possible for you to receive it completly you could use a
implementation of org.apache.james.smtpserver.MessageHandler and plug in
this one in thesmtphandlerchain.
bye
Norman
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