[imp] Strange logs in apache

Thu Oct 11 21:14:58 UTC 2012

Hi, I'm getting strange logs in my access.log in apache for the horde site:

  ...GET /static/b169ed96a0dc55b4a76d1a29a1848ae3.css HTTP/1.1" 200 115911
"https://myhordeserver.xxx.xxx/imp/compose-dimp.php?to=20120917130155.Horde.Rgb1fEv4Cn9QV0lzuz0nzRA@myhordeserver.xxx.xxx&popup=1"
"Mozilla/5.0....

  It seems that someone is trying to send a message to an account in the
server that horde is, but this server has no mail services and this account
is very strange
20120917130155.Horde.Rgb1fEv4Cn9QV0lzuz0nzRA at myhordeserver.xxx.xxx

  Any ideias?