How do I know my packets are accepted?

Hi,

Let me describe my problem.
My client send email via my linux box, which has sendmail running. Well,
the client is using private IP(192.168.0.), where my linux box has 2 NICs,
one configured with public IP(a,b,c,d), the other one private IP.
When the client sending mail via the sendmail, I watch the linux netstat,
only SYN packets receieved, but no correponding packets send out.
How do I know my packets are accepted? If the sendmail really accept the
SYN packets from my client, it should do something and issue some
corresponding packets.
Any help will be appreciated.

Jason

In article <bdtuvp$lu9$1@news.seed.net.tw> Jason <JASON88@seed.net.tw> wrote:

> My client send email via my linux box, which has sendmail running. Well,
> the client is using private IP(192.168.0.), where my linux box has 2 NICs,
> one configured with public IP(a,b,c,d), the other one private IP.
> When the client sending mail via the sendmail, I watch the linux netstat,
> only SYN packets receieved, but no correponding packets send out.
> How do I know my packets are accepted? If the sendmail really accept the
> SYN packets from my client, it should do something and issue some
> corresponding packets.
> Any help will be appreciated.

Why not just examine the /var/log/maillog file and see if the transaction
was successful or not?


tony




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"Jason" <JASON88@seed.net.tw> wrote:
> Hi,
>
> Let me describe my problem.
> My client send email via my linux box, which has sendmail running. Well,
> the client is using private IP(192.168.0.), where my linux box has 2 NICs,
> one configured with public IP(a,b,c,d), the other one private IP.
> When the client sending mail via the sendmail, I watch the linux netstat,
> only SYN packets receieved, but no correponding packets send out.
> How do I know my packets are accepted? If the sendmail really accept the
> SYN packets from my client, it should do something and issue some
> corresponding packets.
> Any help will be appreciated.

you might want to run 'tcpdump' or 'ethereal' for watching your network
traffic a bit closer.
And/Or check out your maillog file if the remote MTA accepted your mail.

--franz