Naked Line Feed Characters
If you see this error reported
by your mail server or mail client:
451 Failed Naked LF see https://netwinsite.com/surgemail/help/smtplf.htm
This occurs because your client
or the original client that sent this mail message sent LF characters without
preceeding them with CR characters. This is faulty behaviour and not permitted
by the SMTP RFC.
We offer the following solutions:
- If possible correct the mail client.
- The mail client may well be a
malicious program sending spam or a virus in which case it can be safely ignored.
- If you cannot fix the mail client
and you don't mind breaking the rules as defined by the SMTP RFC then ask
the manager of the system in question to set: g_lf_fix "TRUE"
in surgemail.ini. That will tell SurgeMail to attempt to repair the message.