webmail showing Plesk default page

[RihadG]

Hi, all. When navigating to webmail.domain.com we see Plesk default page instead of Horde webmail. I checked, domain has a mail-only (no hosting) plan and Horde is enabled in it.

 

[RihadG]

Strange, started working all by itself after I reposted the settings forms and waited about 10-15 minutes...

 

[RihadG]

Plesk default page continues coming on for migrated domains, although webmail is turned on. I tried setting webmail to None and then back to Horde, but got this error:

Error: Failed to switch on the webmail service.: IP pool is empty.
Failed to switch on the webmail service.: IP pool is empty.
Failed to change the mail service settings for domain example.com

What the hell is that?
Now the domain owner cannot use webmail and is very unhappy...

p.s.: plesk 11.x


I've just noticed that in global Tools & Settings -> IP addresses the domain in question isn't present. That's probably because it has no hosting, i.e. mail only. Does that mean they can't use their webmail either? That would be strange.