By all means try it yourself!
Just out of interest I have now tried that with my VM email accounts and I cannot replicate what you are seeing.
Having said that though, it seems that some people are having issues with not being able to access some of the features in their Webmail account.
For example, there have been people getting the "server unreachable" error when trying to access their Vacation Notice (aka Holiday Notice) settings in webmail .
See a couple of affected users here. https://community.virginmedia.com/t5/Email/Not-able-to-set-Holiday-Notice/td-p/5220278
Again though I cannot recreate that Vacation Notice issue either.
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