From: Mike N. 

On Mon, 30 Apr 2007 23:24:51 -0400, "Geo."  wrote:

>I recently contacted yahoo postmaster support thru their web form initially
>and tried to explain this, then they responded and I tried to explain again
>and again and again until I realized, it's a bot.

   It might be a bot that only understands Sendmail logs.  They don't know
how to interpret the log to understand that the connection dropped.   They
are looking for 451 and 421 error messages, and that's all they know.

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