Wireshark · Wireshark-users: [Wireshark-users] (no subject)

["Jay Gellman" <jgellman@xxxxxxxxxxxxxx>]

I am tracking a slow email transfer problem with one of my servers and have found the following:

I can see the handshake and transfer of commands to the mail server; I see data flowing then after about 20 packets I see a TCP DUP Ack

Then the rest of the packets reply with a [TCP Window Full] Message Body

Does anyone know what would cause this?