SMTP error codes from the server. Just watch tcp 25 for a while, wait for an email to fail, and check out the packets. I don't seem to have a pcap w/a failure. Google "smtp error codes" and you should find a list of common errors. These might provide a hint as to what is happening.
On Mon, Jun 28, 2010 at 12:26 PM, Ivan Lezhnjov Jr. <[email protected]> wrote: > Anything I should look out for specifically? > > On Monday 28 June 2010 16:13:23 dan (ddp) wrote: >> You could try using tcpdump to see if there is an error returned from >> the remote smtp server.
