[Mailman-Users] Question about rejection messages.

Mark Sapiro mark at msapiro.net
Wed Jul 2 05:34:15 CEST 2014

On 07/01/2014 07:12 PM, Stephen J. Turnbull wrote:
> Mark Sapiro writes:
>  > At 05:00 local time this morning my Mailman installation sent password
>  > reminders to 65 comcast.net addresses. Of these, exactly 1 bounced with
>  > 
>  > 550 5.1.1 <user at comcast.net> Account not available (in reply to RCPT TO
>  > command)
> OK, so we know Comcast will admit that a user doesn't exist.  Is this
> a personalized list?  Maybe Comcast does something different with a
> multiple recipient RCPT TO that contains multiple invalid users?

These and the OP's were all password reminders which are all
'personalized' and sent to a single RCPT TO

> Also, note that this message, presumably a quote from comcast.net up
> to the open paren, includes an extended status code whereas the OP's
> error did not.  I wonder if his MTA was actually talking to
> comcast.net?  Maybe somebody gave him a "comcast.com" address by
> mistake or something like that?

Good observation.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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