@g0akc wrote:
My wife isn’t receiving certain messages to her VirginMedia.com email account,
How can we check/retrieve these emails please?
The first thing to check is that those emails are not being blocked by a filter / rule in her VM Webmail account.
Sign into the account from here https://mail2.virginmedia.com/ and follow steps 1 to 4 below

If there are any rules set up I would disable them for the moment and see if any new emails that the NHS sends come through ok. If the address has been blacklisted in the webmail account that will also show up at the top of the filter rules. You can then go into the Blacklist option and delete that address from the blacklist.
Sadly, if the the emails that have not arrived are not in the spam, trash or one of the other email folders they cannot be retrieved. They are lost for good
The NHS will have more details about what happened to those emails than Virgin Media because there will be evidence in their outgoing email logs. Unfortunately, in my experience, email sending organisations are rarely willing to help in these circumstances.
The longer term solution may well be to switch to using another email account when dealing with the NHS. Gmail would probably be a good bet,
Out of interest, is the sending email address of those missing emails "@nhs.net"? I only ask that because I remember a few years ago emails sent from that address were regularly being blocked by email providers because at the time the NHS were (inadvertently) allowing it to be used to send large quantities of spam. I am sure they have cleaned up their act since then so that is unlikely to be what is happening now,
Coenoby
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