At 17:12 19-10-2009, Hector Santos wrote:
Isn't it sufficient to note SMTP is a single channel client/server
state machine protocol? Clients send commands, Servers respond.
I'll quote Section 1.1 as it says it better:
"SMTP is independent of the particular transmission subsystem and
requires only a reliable ordered data stream channel."
At 18:20 19-10-2009, David MacQuigg wrote:
I see no technical problem on the server side with sending "552 Too
much mail data," then a TCP reset. If the client keeps retrying,
without fixing the problem, I would block that IP address for a few hours.
The (SMTP client) retry can be from another IP address.