mail.site1.com redirects to www.site2.com

[a.sheipani]

hello everyone.
the problem i am facing is that, i have two websites hosted on my server, site1.com and site2.com
if itry to visit http://mail.site1.com it redirects me to www.site2.com.
why is that happining??
and this is just an example, in fact if i visit mail.anysiteontheserver.com i get redirected to site2.com.
thanx in advance

 

[Kelmas]

As long as you haven't set up mail.domain.tld in your subdomains, it will point to default server page. This is because your server has DNS entry for mail.domain.tld, while Apache hasn't VirtualHost entry.