If it is
too long, sendmail will print and log the following error, and truncate that header line to hdr
bytes:
Truncated long MIME header name:value header (possible attack)
Headers in the class $={checkMIMETextHeaders} include the default Content-Description:
header. Such headers are simply truncated.
Headers in the class $={checkMIMEHeaders} include the defaults Content-Disposition:,
Content-Id:, Content-Transfer-Encoding:, Content-Type:, and MIME-Version:. Suchh eaders
are more intelligently truncated in a manner that ensures they will remain legal.
When processing messages, if sendmail finds a MIME header that is listed in the class
$={checkMIMEFieldHeaders} (?§22.6.2 on page 870), it will check each parameter to insure
that it is not larger than param bytes. For any that are too large, sendmail prints and logs the
following error, and truncates that parameter to param bytes:
Truncated MIME parameter header due to field size (possible attack)
The MaxMimeHeaderLength option is not safe. If specified from the command line, it can
cause sendmail to relinquish its special privileges.
24.9.70 MaxNOOPCommands
Number of useless commands before a slowdown V8.14 and later
Prior to V8.14, sendmail set 20 as the limit on the number of useless commands received
from a client before it would slow down its responses to that client.
Pages:
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877