Where are the Exim logs? Aaron Horsley November 16, 2020 14:55 Updated Question Where can I find my Exim email logs? Answer These are located in /var/logs and are named: exim_mainlog exim_rejectlog exim_panilog Related articles Reading and understanding the exim_mainlog New or transferred account unable to receive mail: Rejected relay attempt | 550 Please turn on SMTP Authentication | $HOST is not permitted to relay through this server without authentication What is The Difference Between Remote Vs. Local Mail Exchange Within "Email Routing"? 550-Please turn on SMTP Authentication in your mail client Emails are not sending; (99) Cannot assign requested address. Comments 0 comments Article is closed for comments.