Mailenable webmail access problem (multiple webspaces)

[FlameX]

Could someone help me on this please:
I have 2 webspaces on my server, www.a.com and www.b.com

I initially setup www.a.com, everything works fine and I can access the emails for a.com through webmail.a.com
Then I setup www.b.com using almost identical DNS settings, except that each domain has its own dedicated IP

Now, the problem is I am not able access webmail.b.com, the error message is server not found, why is this?
It seems that I can only access the emails for b.com using webmail.a.com

I have mailenable version 8 standard installed

 

[IgorG]

We can't reproduce it. Looks like that something wrong with DNS or IIS settings. Check IIS binding for MailEnable WebMail site. Check that webmail.b.com is correctly resolvable.

 

[FlameX]

We can't reproduce it. Looks like that something wrong with DNS or IIS settings. Check IIS binding for MailEnable WebMail site. Check that webmail.b.com is correctly resolvable.

You are right, manually adding webmail.b.com into IIS binding for MailEnable WebMail site has fixed the issue

Thanks!