Hi rnmilnes,

I am not sure what could be causing this. If you take a look at the original message or view the message in HTML you can see if the body exists in the email.

This can happen with the encoding of the email is multipart or is just being rendering improperly.

Go to View > Message Body As > Try all of these

If this does not help, see if the emails are rendering differently on the webmail as well, this would be a server error.

I have been able to read the emails previously but when I went back to read them again all the content had gone for emails prior to 16 June. About a month ago all of my emails prior to 12 May disappeared completely. I am just about to give up .

I shifted over to Outlook which I don't like!!!! I I tried the above suggestion and only the shows the emails read okay on webmail so they are not corrupted. The original emails were okay when they first we downloaded. the latest 10 emails were all okay but all those prior to that the content had disappeared. At present I have been Thunderbird and Outlook. Thunderbird is retaining the content apart from having one further incident on Thunderbird with a content has disappeared. Very frustrating I don't like Outlook I want my Thunderbird back.

HI BrianMcGettigan, Glad to hear that the old mail still exists on the server. It is possible to redownload it to the Thunderbird client. My suspicion would be to also check your retention policy for the account in Thunderbird. Thunderbird FAQ

Also: "Tools > Account Settings > <account name> > Disk Space" and "Tools > Account Settings > Local Folders > Disk Space", the option "Don't delete any messages".