Does analysing the email header reveal where the delay is, read more here Email Header Analyzer, RFC822 Parser - MxToolbox
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@tomhulme wrote:They appear in the web email server but don't arrive in my Outlook for several hours.
If the emails are arriving in your Webmail account but then are slow downloading to Outlook it does seem that the issue is with the IMAP/SMTP process in Outlook.
I have Outlook installed as part of Office 365 although I gave up using it a while ago, these days I prefer Thunderbird, much better in my experience.
However, I have just fired up Outlook and it downloaded all my Ntlworld.com and Virginmedia.com emails with no delay at all.
If you are still experiencing issues with Outlook you could check your Send and Receive scheduling by following the steps 1 and 2 below and then check the area I outlined in red in the resulting pop up box
Are you seeing any errors from Outlook that indicate it's having problems accessing the VM servers or downloading your emails?
Alternatively, slow downloading could be the result of an issue with your VM broadband, so are you seeing any delays accessing other websites? If you are in any doubt you could check the download speed you are getting from this link https://speedtest.samknows.com/
Coenoby
Thanks.
This is what comes up in the header from the Virgin email web browser. Not sure what it means?
Nothing comes up with the header from when it arrives in Outlook.
Thank you.
However my Outlook Send Receive settings are the same as yours, and no slow download speeds accessing other sites:
