Need help with Sendmail configuration

[Steven Gillard_2]

My next step would be running a nettl trace to have a closer look at the DNS and SMTP traffic. If you've never done that before here's a crash course... this will limit the size of the trace file to 10Meg. Be warned if your system is busy it will fill this up quickly so you may want to test on a quieter system if you can.

To start tracing:

# nettl -tn pduin pduout -e ns_ls_ip -tm 10000 -f /tmp/smtp -s 1024

When this command returns, attempt to send your email. Then turn off tracing:

# nettl -tf -e all

Now to format the trace to display DNS and SMTP, create the following filter file:

filter udp_sport 53
filter udp_dport 53
filter tcp_sport 25
filter tcp_dport 25

And run netfmt as follows:

# netfmt -lnN -c /tmp/smtp.TRC0 | more

If you don't see anything, check /tmp/smtp.TRC1 as well.

Have a close look at the DNS traffic related to MX lookups or requests for information about vistsmtp.visteon.com and eccmfw1.ford.com. Remember if your system is busy there will probably be loads of other DNS traffic as well, but thats half the fun of network tracing...

Regards,
Steve

[Robin Wakefield]

Hi Scott,

Please try:

sendmail -d38.20 -bv scott@hotmail.com

This will show if there are any map lookups going on, e.g. mailertable

If anything interesting appears, please post.

Rgds, Robin.