Re: Mac 10.4 OS on G5
- From: "Helen Mooc" <hmooc@xxxxxxxxxxx>
- Date: Thu, 8 Jun 2006 15:37:59 -0400
Hi Alan
I called into the SBS Team Support yesterday because I was getting bombared
with too much demands.
I spoke to 3rd level support and gone thru system analysis as to what has
changed before the Mac problem begin. I told them that I do recall changing
the dual NICs on the server from teaming as Load Balance to Fault Tolerance
mode. We edit the registry to allow any flow of data thru via IMAP4. We
also try changing the MTU on the NIC of the Mac from 1500, 1492, 1000 and
then 512 one value at a time, reboot, and testing sending attachment. The
best value that worked in our case was 512. I started to see progress on
the Mac and eventually it did send large attachment files without timing
out. They have advised that maybe changing the Teaming Nics from one mode
to the next might have caused the adverse effect on Mac. I was told that
since they have seen a lot issues that caused by using Teaming NIC that I
was suggested to use one NIC on the server instead of two and so I switch it
back to using 1 NIC on the server. Afterwards I was advised to restarting
the main switch where it connects the server and workstation to flush out
the routing table.
Helen
"ALeghart" <aleghart@xxxxxxxxx> wrote in message
news:1149317451.723253.268620@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Simplified answer:
E-mail written in plain text, RTF, and HTML are all text-based. SMTP
relays process text, so it is no problem sending this type of traffic.
Binary files must be encoded into text so they can pass from one SMTP
relay to another. They are un-encoded upon receipt, and appear as the
regular files, i.e. JPG, GIF, XLS, etc. (That's one reason why it's a
huge waste of time and processing power to send 10MB of attachments
when FTP or HTTP is available. Convenience often overrules this
logic.)
If the WAN gateway was filtering certain types of encoding, you might
see text-based messages flying through just fine, while anything with
non-text attachements would possibly time out. Same would go for a
firewall or AV product installed on the desktop.
Some products, like Norton/Symantec Anti-Virus will block your traffic
if its definitions are too far out of date. Users often report this as
"the mail server is down". After updating their definitions, email
traffic to that user's desktop magically resumes.
Hope your problem is resolved.
Regards,
Alan Leghart
Helen Mooc wrote:
Sorry Alan, I know you guys are trying to help. I have been drowned with
network issues beside just Mac itself. There is only one of myself in
the
network. I will take a look at it over the weekend. Just so you know,
I
fixed another weird issue with MS Exchange team last night and I am just
wondering if all is related. People from outside company can not send
JUST
meeting request into our company. Everything else came in fine. We
found
out that our firewall was blocking the vCalender MIME type email. After
disabling this feature, everything works fine. I am just wondering if
you
have any idea if we we could have blocked something from within for Mac
to
all of sudden stop sending attachment. Another thing I want to mention
is
that when we send attachment from Mac, a msg comes up saying "encoding
attachment". Why is it doing that?
.
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