Quoting Rodrigo Abrantes Antunes <rodrigoantu...@pelotas.ifsul.edu.br>:

Citando Rodrigo Abrantes Antunes <rodrigoantu...@pelotas.ifsul.edu.br>:

Citando Vilius Šumskas <vil...@lnk.lt>:

Citando Vilius Šumskas <vil...@lnk.lt>:
    Rodrigo Abrantes Antunes <rodrigoantu...@pelotas.ifsul.edu.br> rašė:
    More logs in my mail server, not the one where horde is:

  Here you say that it is your mail server.

But the strange thing is how the message id is ..@myhordeserver.xxx.xxx if
    it's not my mail server?

  Here you say that it is NOT your mail server.

  So which is it?

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Those logs were in my mail server like I said. But the message id was of the horde server, this is exactly what I found strange, how the message id is ..@myhordeserver.xxx.xxx if it was sent by my mail server and should be ...@mymailserver.xxx.xxx?
   

I thought it was strange because of this (a message id being interpreted
as an e-mail):

...GET /static/b169ed96a0dc55b4a76d1a29a1848ae3.css HTTP/1.1" 200 115911
"https://myhordeserver.xxx.xxx/imp/compose-dimp.php?to=20120917130155.horde.rgb1fev4cn9qv0lzuz0n...@myhordeserver.xxx.xxx&popup=1";
"Mozilla/5.0....

As if someone was trying to send an email to a message id. But Michael
Slusarz said this: "It looks like a Message-ID header from a message sent
by Horde/IMP is being interpreted as an e-mail address somewhere in
Horde/IMP. Looks like we are running the e-mail text search filter on the
Message-ID header when we don't need to (maybe in View All Headers in the
standard IMP view?) and a user is clicking on that.

Possible explanations:

1. The bot (or spamming) service is broken/dumb, and is trying to send messages to a non-existent e-mail address. 2. Your compose script has been compromised and this particular To string is used to activate the bad code in the compromised script.

michael

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Michael Slusarz [slus...@horde.org]

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