[Sysadmin] (Fwd) Undeliverable Mail

[William Anderson]

Dean Mah wrote:
> [snip]
>
> I believe that the 'address subbed to thelist' is passed to the MTA
> along with a list of other ones.  The MTA goes through the list and
> e-mails the addresses individually.

it does

> I believe that the 'final recipient' is handled by the receiver's MTA.
> If the receiver's uses aliases, .forward, procmail, etc., their local
> MTA will rewrite the header and send it to the final recipient.

sounds fair

> So I think that our MTA has to write the 'address subbed to the list'
> into the headers.

or Mailman, which seems the more logical place to do it, as long as that
handler that's bunging in X-evolt and X-MajorGumbo headers can be made aware
of an individual email address at that stage, or does it bung the same
headers in each email sent out as a batch, e.g. is it

  - Joe sends a mail to thelist
  - mailman receives it, munges it, adds unique headers to each and every
    mail as it's sent out to recipients (X-evolt in particular)
  - Bob receives a mail from thelist with a different X-evolt header from
    Joe, Susan, Pete and Cathy

or is it

  - Joe sends a mail to the list
  - mailman receives it, munges it, adds some headers, and sends copies
    of that one mail to recipients
  - Bob receives a mail from thelist with the same X-evolt headers as
    everyone else

I hope you see what i'm getting at here - if it's the former, great, Mailman
can handle bunging in the subscriber's address into the headers for us to
use for tracing.  If it's the latter, Mailman doesn't have a scoob at that
point, and it would then be up to the MTA to munge in some custom headers,
that would then possibly affect meo mails too.

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