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Emails with attachments load *very* slow

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Emails with attachments load *very* slow [message #31080] Wed, 13 September 2006 22:56 Go to next message
watermac
Messages: 2
Registered: September 2006
Junior Member
I have Outlook 2003

Whenever I click on an email to read it, if it has an attachment, the email
(not the attachment itself) takes several minutes to load. This is true no
matter what the size of the attachment is (for example, a 30K Word document).
This happens every time I select that email, not just the first time.

I do not suspect that this is a problem related to my connection speed: When
I select the exact same email in Outlook Express, there is no lag at all (or
a very tiny, typical one). The problem only seems to exist in Outlook.

Thanks for the help!
Re: Emails with attachments load *very* slow [message #66422] Wed, 13 September 2006 23:25 Go to previous message
Vanguard
Messages: 711
Registered: June 2006
Senior Member
"watermac" <watermac@discussions.microsoft.com> wrote in message
news:03C631BA-6255-4B2D-9D06-BCB922105798@microsoft.com...
>I have Outlook 2003
>
> Whenever I click on an email to read it, if it has an attachment,
> the email
> (not the attachment itself) takes several minutes to load. This is
> true no
> matter what the size of the attachment is (for example, a 30K Word
> document).
> This happens every time I select that email, not just the first
> time.
>
> I do not suspect that this is a problem related to my connection
> speed: When
> I select the exact same email in Outlook Express, there is no lag at
> all (or
> a very tiny, typical one). The problem only seems to exist in
> Outlook.
>
> Thanks for the help!


There is no such thing as the e-mail and some separate attachment.
The attachment is IN the e-mail. All e-mail gets sent as plain text.
Coding it used to provide formatting. For attachments, they are
encoded from binary into text into a MIME-type part WITHIN the e-mail.
If it takes a long time to get the e-mail then perhaps it is because
those e-mails with attachments are huge in size. Because of this
conversion from binary to text, the text data to represent it could be
30%-50% larger than the original binary file. That why you might
surpass, say, a 10MB limit per-message size quota when you sent an
e-mail with minimal message text and attach a 7MB file because, after
conversion to text, that e-mail could exceed the 10MB per-message
quota. If you are getting graphics as attachments, the e-mails could
be quite large. It depends on what type of image file was attached.
JPEG uses less bytes than Bitmap. Obviously the larger the e-mail
size in bytes then the longer it takes time to download it.

Also, you probably enabled scanning of your e-mails by your anti-virus
program because you thought that gave you extra protection. It
doesn't and duplicates the detection provided by the real-time (aka
on-access) scanner. Turn off or disable e-mail scanning by your
anti-virus program. When the e-mail gets received, the AV program
intercepts and scans a copy of it before submitting it to your e-mail
program to save it. That scanning takes time, and the bigger the
e-mail, especially with all those graphic-laden messages. In fact,
the scanning can take so long that the e-mail program may timeout
thinking the mail server never sent anything or stalled because
nothing is getting delivered to it after sending a RETR (retrieve)
command and until the AV program gets done scanning it to then pass it
to the e-mail program. Some AV programs have an option to send a
bogus X-header to the e-mail program to trickle something to it to
keep it from timing out after sending the RETR command.
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