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Posted to server-user@james.apache.org by Hillel <hb...@ecommunicate.co.za> on 2010/07/19 15:29:21 UTC
preventing duplicate emails using Message-ID
Hi,
In the SMTP protocol when an email arrives does it always has a Message-ID?
Is the Message-ID always unique?
We are having a problem with a customer that adamantly says they are sending
only one email to our JAMES 2.3.2 stable.
Our James smtpserver.log shows many duplicate emails from that customer.
If we look at the duplicate emails they all have the same Message-ID.
We don't know if the problem is with the client or somehow on James.
So we are proposing to the client that we will save the Message-ID's from
the emails and if a new email comes in we will only process emails where the
Message-ID is unique and discard the rest.
Have other James users tried this?
Any suggestions appreciated.
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RE: preventing duplicate emails using Message-ID
Posted by Hillel Bilman <hb...@ecommunicate.co.za>.
Hi,
Thanks for your great response.
rgds
-----Original Message-----
From: norman.maurer@googlemail.com [mailto:norman.maurer@googlemail.com] On
Behalf Of Norman Maurer
Sent: 19 July 2010 05:56 PM
To: James Users List
Subject: Re: preventing duplicate emails using Message-ID
Hi there,
if you see the the message a few times in the smtpserver.log then its
not a problem in james..
About the message-id, yes it should be global unique and it "should"
be in every message. See the rfc for more details:
http://www.faqs.org/rfcs/rfc2822.html <- 3.6.4. Identification fields
So you could try to check for the message-id and if you received the
message already just set the state of the message to Mail.GHOST. An
other idea would be to generate a md5 of the message and check if you
have a match..
Bye,
Norman
2010/7/19 Hillel <hb...@ecommunicate.co.za>:
> Hi,
>
> In the SMTP protocol when an email arrives does it always has a
Message-ID?
> Is the Message-ID always unique?
>
> We are having a problem with a customer that adamantly says they are
sending
> only one email to our JAMES 2.3.2 stable.
> Our James smtpserver.log shows many duplicate emails from that customer.
> If we look at the duplicate emails they all have the same Message-ID.
> We don't know if the problem is with the client or somehow on James.
>
> So we are proposing to the client that we will save the Message-ID's from
> the emails and if a new email comes in we will only process emails where
the
> Message-ID is unique and discard the rest.
>
> Have other James users tried this?
>
> Any suggestions appreciated.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: server-user-unsubscribe@james.apache.org
> For additional commands, e-mail: server-user-help@james.apache.org
>
>
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---------------------------------------------------------------------
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Re: preventing duplicate emails using Message-ID
Posted by Norman Maurer <no...@apache.org>.
Hi there,
if you see the the message a few times in the smtpserver.log then its
not a problem in james..
About the message-id, yes it should be global unique and it "should"
be in every message. See the rfc for more details:
http://www.faqs.org/rfcs/rfc2822.html <- 3.6.4. Identification fields
So you could try to check for the message-id and if you received the
message already just set the state of the message to Mail.GHOST. An
other idea would be to generate a md5 of the message and check if you
have a match..
Bye,
Norman
2010/7/19 Hillel <hb...@ecommunicate.co.za>:
> Hi,
>
> In the SMTP protocol when an email arrives does it always has a Message-ID?
> Is the Message-ID always unique?
>
> We are having a problem with a customer that adamantly says they are sending
> only one email to our JAMES 2.3.2 stable.
> Our James smtpserver.log shows many duplicate emails from that customer.
> If we look at the duplicate emails they all have the same Message-ID.
> We don't know if the problem is with the client or somehow on James.
>
> So we are proposing to the client that we will save the Message-ID's from
> the emails and if a new email comes in we will only process emails where the
> Message-ID is unique and discard the rest.
>
> Have other James users tried this?
>
> Any suggestions appreciated.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: server-user-unsubscribe@james.apache.org
> For additional commands, e-mail: server-user-help@james.apache.org
>
>
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