when i open webmail.domain.com it returns 404 error whith html title showing "Plesk Web mail Client" in title bar of browser.

any help to solve this?

 

that sounds like a php-problem.

we have the same problems. first i got the same 404 error message like you. i tested the iis with a regular html-site and it worked fine.

so i tried this:

going to iis
domain --> properties --> home directory --> configuration --> mapping

adding .php and path to php.exe to mapping list

from that on i got no 404 error, but now this site waits endless for reloading!!

so i need some help too :-(

 

It seems you need update your Plesk up to 7.5.4 and install 2 hotfixes available from sw-soft.com
Then you can try to remove webmail from IIS and then reconfigure it with "websrvmng.exe --reconfigure-webmail" from %plesk_bin%

If this will not help then you can modify Plesk installation via add/remove programs and uninstall Horde. Then delete folder webmail from vhosts folder and reinstall Horde via add/remove programs

 

This is a late response but I have had exactly the same problem and here is my solution.

webmail.domain.com, gave me exactly the same error.
when I tried webmail.domain.com/imp , I have found out that everything works fine.

Then I changed the "home directory" of horde to "C:\Inetpub\vhosts\webmail\horde\IMP" (may differ in your setup)
(Start / All Programs / Administrative Tools / IIS Manager / Your Server Name / WebSites / Webmail(horde) right click / Properties / Home Directory / Local Path)

Then webmail.domain.com started to give errors like mentioned in the following posts:
http://forum.parallels.com/showthread.php?t=101624
http://forum.parallels.com/showthread.php?t=77979

After that, I changed the "Local Path" back to the original address. ("C:\Inetpub\vhosts\webmail\horde")
Then everything was back to normal and working perfectly!
Seems like it is kinda simple confliction in registery or something like that.

Hope works for someone else too.