Why doesn’t Windows 2008 server negotiate TCP MSS smaller than 536 bytes?

Hi, In today’s blog, I’ll talk about an MTU issue that occurs on Windows Vista onwards (Vista/7/2008/2008 R2). One of our customers reported that their SMTP server (running on Windows 2008) was failing to send e-mails to certain remote SMTP servers because e-mail delivery was disrupted at transport layer. After analyzing the network trace collected…

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