SMTP returns sockXXX error when sending large emails

Hi,

On a Windows XP Pro box I have a strange problem when using the smtp package to send large emails or emails with large attachments (>70KB not all that big really). The problem seems to be related to the Trf package that is loaded inside the smtp module. If I remove the bit about Trf and try to send I can send huge files wiht no issue what so ever. Has any one ever seen this OR have any idea why this is happening. I have no problems emailing large files using Outlook or Thunderbird on my system. I currently using the iocpsocket package but the problem orignally was happening with the standard Tcl socket at a much lower payload (>10K).

The error is as follows:

400: error writing "iocp508": invalid argument

I had Pat Thoyts look at the issue and he's recommended using sockspy to debug the problem but when I put sockspy in the loop the problem went away.

Also, I noticed that when I enable the -usetls option it does not encrypt the message as it's sending so I'm also wondering if this may have something to do with the issue. Like there is a package missing but no documentation to help you figure this out.

Now Pat Thoyts swears that this all works fine for him on his Windows XP box but I have yet to see it work for me. I've tried it on both my desktop and my laptop with the same result. I'm baffled. Any help would be very much appreciated!

Robert Joy
.

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