duplicate email messages and missing webmail messages

[#1]

For some reason, I have been receiving multiple email messages to my PN account over the past couple of days - sometimes 4 or 5 of the same message (single addressee). Anyone know how to stop this ?
In addition, I configured my email a couple of years ago so that all of my incoming messages remained accessible via webmail here, despite me having them downloaded to a desktop via MS Outlook. Having just logged into webmail, there are no received messages at all, and I cant seem to locate the relevant  settings to save them. Can anyone throw any light please?

[#2]

You have two mailboxes. Are you sure you're logging into the correct one when accessing via Webmail? The format for the additional mailbox username should be <username>+<mailbox-name> e.g. mypnusername+john.

[#3]

I cant see to access any other webmail, and there does not appear to be an option to generate a password reminder. Do I need to phone in for this?

[#4]

You can reset the passwords here: http://email.plus.net

[#5]

Thanks Jelv.
That logs me into the member centre, from where I can see all my email accounts (although why I need a further login to actually access the emails I dont know.) Anyway, I can see that messages are coming in via webmail, but soon after, presumably after they've been downloaded to my desktop, they disappear from webmail. This is not how I set it up, and certainly not how the account used to operate. Can someone give me a pointer for the settings to retain messages on the server, whilst also having them downloaded please?

[#6]

I believe these settings are via your email clients not webmail. I would check the settings on outlook, mobiles etc.
I don't think it's a good idea to leave two years or more emails on  planet's servers. Eventually they will delete them as reported previously on these fora 

[#7]

I suspect this has something to do with your problem.

[#8]

Checked that Outlook is configured to retain messages on the server - it is, and for 14 days. So that's not working at all, and continuing to receive duplicate emails for no apparent reason.
Just when I was considering coming back to PN using their FTTC service as well. Maybe not now.

[#9]

Did you read the Microsoft thread linked in the forum post I pointed you towards? There is a known problem affecting Outlook 2016 that's causing it to delete messages from the server despite you telling it not to. That's Microsoft's doing, it has nothing to do with Plusnet

[#10]

Also, if you expect to read message both in webmail and using a local client you'd be far better off using IMAP rather than POP3!