May have solved the MAIL oddity - at a price.
Using the problem email account the following warning message was shown.
QUOTE Online Status
There may be a problem with the mail server or network. Verify the settings for account "zen.co.uk" or try again.
The server returned the error:Mail cannot send your password securely to the server. You can remove this restriction in the Accounts preferences by setting "Allow insecure authentication", which could put your password at risk.
I was not keen to "put my password at risk" so tried everything I could think of in the settings with no joy.
And when trying to send an email message the following was displayed
"Unable to verify account name or password".
Then I looked at an older G4 iBook Mail settings and there was "NO AUTHENTICATION" in Mail settings, so I would appear to have been at risk for years now.
So is it really a serious risk?
If so, where are the rules/guidelines for revising the Mail Settings?
I have changed the Mail setting for this account to "Allow insecure authentication" and it all seems to work normally for sending and receiving emails.
But am I on thin ice?
Edited by DIOGENES (Fri 06-Jan-17 11:23:30)