Deleting emails from folders

[#1]

Been attempting to delete old emails saved in folders

start at settings, then folders, click folder , then information, then click to get size ,all okay 

i may be lucky and get the next folder to open but usually everything freezes then , have to click mail 

and start all over again , on top of that i have to work around an error signal every time i click something

RED box Connection Error failed to reach server 

I only use plusnet webmail     is the above normal

Ken M

[#2]

It's very temperamental but there is SOMETIMES a fix for the error message at least: 

Log into webmail
On the inbox list screen select LIST OPTIONS which is the little grid icon on the left of the column title bar
Set sorting column to NONE
Click save

[#3]

Hi have already checked that and replied on an earlier mention of problem ,It was already ticked

as someone else said it even starts on the login page before signing in.

once signed in the big red box with message hangs about over the mail and address book icons with every click it keeps coming back

kenm

[#4]

There is an issue with the Roundcube production Ct when navigating the mail management menus such as exploring folders. No more than 3 clicks in the folder navigation screens will function, after which you need to do a page refresh

The product has been like that forever and (AFAIK) has nothing to do with the RANDOM connection issues to the IMAP server.

If your primary aim is to cull emails, you might find the basic (Squirrel) email client more productive.