The email server has started putting up the following message on some addresses.
An error occurred while sending mail. The mail server responded: Please turn on SMTP Authentication in your mail client.
171.146.112.87.dyn.plus.net ([192.168.0.5]) [87.112.146.171]:50034 is not permitted to relay through this server without authentication.. Please check the message recipient snipped-for-privacy@gmail.com" and try again.This does not happen with mac.com addresses or some others I suspect the email server has had it's software improved, any comments. by the way using the gmail account works,