Re: Sendmail error "Deferred: Transport endpoint is not connected"

[Scott Klement <pctech@xxxxxxxxxxxxxxxx>]

Hi David,

In sockets programming, that message "Transport endpoint is not 
connected" refers to the act of trying to read/write to a socket that 
hasn't yet been connected.  The mnemonic for it is ENOTCONN.

I haven't seen it in conjunction with Sendmail, but I can only guess 
that there's a Milter (like a spam filter, virus scanner or similar 
tool) that's connected to the Sendmail server via an AF_UNIX socket, and 
that Milter has gone down.

Are you getting this error on your own Sendmail server, or is it being 
reported to you from a remote server?  I'm guessing your MTA is 
connecting to a remote MTA, and trying to send the message to the remote 
MTA.  The remote MTA is trying to run your message through some sort of 
milter, but the milter is failing with that error message, so it sends 
you back a "4xx x.x.x Transport endpoint is not connected."  and your 
log file therefore contains "Deferred: Transport endpoint is not connected"

But that's purely an educated guess.




David Gibbs wrote:
> Anyone know what the sendmail status "Deferred: Transport endpoint is not connected" means?
>
> I'm getting this a lot recently ... but I can't figure out exactly why.
>
> When I manually flush the mail queue ... the messages that are in this state send correctly.
>
> david