I get this
Trying 66.96.142.51... Connected to 51.142.96.66.static.eigbox.net. Escape character is '^]'. 220 bosimpinc11 bizsmtp ESMTP server ready I am getting the original; error message on all mail i end only tot that server > On Oct 18, 2014, at 10:21 AM, Stephen Satchell <l...@satchell.net> wrote: > > On 10/18/2014 07:01 AM, jason hirsh wrote: >> I have about 8 of these over two days all continue to be retired >> >> I am trying to be pro-active and was just looking if ether was something i >> may have hosed on my side >> >> although this is the only server I have been having problems >> >> I really think the issue is with that server but was just looking for expert >> input > > What happens when you use TELNET to connect to the remote server on port > 25? Perform the test repeatedly from your mail server -- that will help > you with clue. For example, if it takes a long time for TELNET to > connect, then you know the remote server may be overloaded. > > I discovered with, a TACACS daemon with a too-short backlog, that the IP > stack in the server will complete the three-part handshake -- then finds > it can't pass the connection to the LISTEN socket because the backlog is > full. After the various TCP wait times expire, the stack sends RST and > forgets the connection. The key for making me think this is the > scenario is the clause "while receiving the initial servergreeting" in > the log message. > > The remote SMTP server may never have had the connection passed on to it > because of high backlog overflow on the remote host. > > One reason the remote operator doesn't see a problem is because s/he > never knows this is happening (no logging of the event) and no other > mail server operator has complained to him about this. I know I would > ignore the message when I see it. > > Are you getting bounce messages on mail being sent to this server? Are > you seeing this happen again and again on the same queued message, or it > is happening with different queued mail? > >
