> > > Having made one entry in the thread about message ID, I could neither edit the entry or add an additional reply
> > > without getting "Proxy Error" messages.  I've had this trouble on this forum before, a long time ago.  Perhaps
> > > it is connected with the html coding?
> > Hi Stefan,
> > 
> > I now cannot even reply to you in the message id thread; I keep getting:
> > 
> > Proxy Error
> > 
> > The proxy server received an invalid response from an upstream server.
> > The proxy server could not handle the request POST /elogs/Forum/.
> > 
> > Reason: Error reading from remote server
> > 
> > Apache/2.2.3 (Scientific Linux) Server at midas.psi.ch Port 443
> > 
> > It is, I think, something to do with the html coding (as I normally use plain, I don't come across this as an issue).
> > 
> > However, in the cause of the experiment, I will submit this entry, then go back and edit it, and if I don't get
> > Proxy Error, then that certainly will be something to do with the html coding.
> > 
> > And this is an extra edited line - if you see this, I got past the proxy error issue this time.  But did you get two
> > emails?
> 
> That is interesting.  I can make 1 (one) submission to a thread which uses html coding, then I get hit by proxy errors. 
> But I can edit, play around or whatever if it is in plain coding.  Yet to see how many emails were generated...

Hi Stefan,

I only got one email in response to the second entry of this thread, no email was received after the edit of the entry.  The
next email received was due to the third entry of this thread.

> > Having made one entry in the thread about message ID, I could neither edit the entry or add an additional reply
> > without getting "Proxy Error" messages.  I've had this trouble on this forum before, a long time ago.  Perhaps
> > it is connected with the html coding?
> Hi Stefan,
> 
> I now cannot even reply to you in the message id thread; I keep getting:
> 
> Proxy Error
> 
> The proxy server received an invalid response from an upstream server.
> The proxy server could not handle the request POST /elogs/Forum/.
> 
> Reason: Error reading from remote server
> 
> Apache/2.2.3 (Scientific Linux) Server at midas.psi.ch Port 443
> 
> It is, I think, something to do with the html coding (as I normally use plain, I don't come across this as an issue).
> 
> However, in the cause of the experiment, I will submit this entry, then go back and edit it, and if I don't get
> Proxy Error, then that certainly will be something to do with the html coding.
> 
> And this is an extra edited line - if you see this, I got past the proxy error issue this time.  But did you get two
> emails?

That is interesting.  I can make 1 (one) submission to a thread which uses html coding, then I get hit by proxy errors. 
But I can edit, play around or whatever if it is in plain coding.  Yet to see how many emails were generated...

> Having made one entry in the thread about message ID, I could neither edit the entry or add an additional reply
> without getting "Proxy Error" messages.  I've had this trouble on this forum before, a long time ago.  Perhaps
> it is connected with the html coding?
Hi Stefan,

I now cannot even reply to you in the message id thread; I keep getting:

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /elogs/Forum/.

Reason: Error reading from remote server

Apache/2.2.3 (Scientific Linux) Server at midas.psi.ch Port 443

It is, I think, something to do with the html coding (as I normally use plain, I don't come across this as an issue).

However, in the cause of the experiment, I will submit this entry, then go back and edit it, and if I don't get
Proxy Error, then that certainly will be something to do with the html coding.

And this is an extra edited line - if you see this, I got past the proxy error issue this time.  But did you get two
emails?

Well, I see just one email notification, have you already submitted your second? I tried on the "Demo" logbook here and I got two notifications. This can of course be turned off with the option "Suppress email on edit = 1". Maybe you are using this? 

Having made one entry in the thread about message ID, I could neither edit the entry or add an additional reply
without getting "Proxy Error" messages.  I've had this trouble on this forum before, a long time ago.  Perhaps
it is connected with the html coding?

 Hi Stefan,

I seem to recall this behaviour on this forum.  I was writing an entry, and due to mis-typing, submitted the entry before I had finished.  So I edited it, but there was only the one email sent.  I thought that this was how the thing was supposed to work.  To try it now, I am going to submit this, then edit the entry a little further, and we can all see if one or two emails are generated.

The message ID is part of the "user data" of the email, not of the standard email header. So the mail servers "do not know" about the message ID, which make it strange that double messages are filtered. Nobody else reported this problem before. Maybe is it related to your SPAM filter? Can you check if the double entries are classified as SPAM in your case? 

We noticed some elog email messages were not showing up in our inboxes at random.  What we believe is happening is when a elog entry is created it is assigned a message id that the mail servers will use.  If a message is edited that same message id is used and some mail servers involved will ignore the duplicate message id.  We have also noticed when a elog entry is deleted the next entry created will assume the deleted entry message id and just like above the email will be ignored since it has a duplicate message id.