At 21:52 12/30/01, David Gillett wrote:
>On 28 Dec 2001, at 16:36, Cesar Mendoza wrote:
>
> > My PC can't send long email messages. If I send a short message
> > everything works fine, but if the message is long then a 0x800CCC0F
> > or time out error occurs...when I configure my email account in my
> > father's PC I can send long emails normally...
>
>My theory is that when you send short messages, they are able to
>be sent as a single packet less than about 1450 bytes in size. But
>when you try to send a longer message, it gets split up into packets
>of (MTU) size, which is currently a bit more than the connection will
>actually allow.
>
>Exactly how to adjust the MTU setting varies from one Windows
>version to another...There are also third-party utilities which can
>be used to set this parameter.
Using the free utility DrTCP is the easiest way I know to change MTU
size. Download DRTCP.ZIP from
http://www.dslreports.com/r0/download/58303;f64d56211ff027c50aa88e39529ecedc/DRTCP.zip
(Be careful if this link gets cut into two lines.)
There are instructions on using this utility at
http://www.dslreports.com/faq/tweaks/1.+DRTCP#1047
Basically, the program will run from anywhere. Unzip it to your desktop
for example. No installation required. Start the program by double clicking
the DrTCP icon. Highlight the value in the MTU box and change it. Hit the
Tab key so that "Apply" becomes enabled. Hit Apply and then Exit. Reboot.)
A lot of DSL users set their MTU to 1492. But you may have to experiment
with slightly different (smaller) values. (Try sending longer and longer
emails with different MTU values and find the MTU that works best.)
Don't forget to reboot after any change made to your TCP/IP parameters.
Regards,
Bill
PCSOFT maintains many useful files for download
visit our download web page at:
http://freepctech.com/downloads.shtml
|