There are two ways that sendmail can detect the
end of a mail message: by noting an end-of-file (EOF) condition or by
finding a line composed of a single dot. According to the SMTP and
ESMTP protocols (RFC821), the end of the mail data is indicated by
sending a line containing only a period. The
IgnoreDots option tells
sendmail to treat any line that contains only a
single period as ordinary text, not as an EOF indicator.
This option is generally used from the command line when reading a message that might have a line in it that contains only a single dot. This option can safely be used in the configuration file because sendmail always turns it off (sets it to false) when reading a message using SMTP.
The forms of the
i option are as follows:
O IgnoreDots=bool ← configuration file (V8.7 and later) -OIgnoreDots=bool ← command line (V8.7 and later) define(`confIGNORE_DOTS',bool) ← mc configuration (V8.7 and later) -i ← command-line shorthand (deprecated) Oibool ← configuration file (deprecated) -oibool← command line (deprecated)
bool is of type
missing, the default value is true (ignore leading dots). If the
IgnoreDots option is entirely omitted, the default
is false (recognize leading dots as special).
IgnoreDots option is safe. Even if it is
specified from the command line, sendmail
retains its special privileges.