[Ipg-smz] Fwd: Mail Delivery Failure

[Richi Jennings]

My best guess is because you're forging your envelope sender and *From:*
header.

When your wildblue.net/exede.net MTA tries to connect to aol.com's MX, the
email isn't really coming from a princeton.edu domain. Neither princeton.edu
nor alumni.princeton.edu permit you to do that—according to their SPF
records.

The SPF authentication failure won't necessarily cause your email to be
rejected every time, but it will reduce the likelihood of it being
accepted. "exceeded max retries" sounds like aol.com is graylisting the
message, but never deciding it's hammy enough to deliver.


// @RiCHi <http://twitter.com/RiCHi> | +44.7789.200701 | 1.408.256.0084
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On Sat, Nov 3, 2018 at 12:06 PM Dennisf63 <fowler63 at alumni.princeton.edu>
wrote:

> For some time now I've been getting Mail Delivery Failure messages seen
> below.
>
> This is just a single sample. It doesn't happen all the time, just often
> enough to be irritating. Often the outgoing messages are replies from me to
> them. Only certain recipients seem to be involved, but more than one. Can
> anyone interpret what these Mail Delivery Failure Messages are trying to
> tell me?
>
> Is the problem me or the recipients? Is it the email system? Is the
> intended recipients box full?
>
> Oh, I'm using Mozilla Thunderbird, if that helps.
> Thanks in advance.
>
> -------- Forwarded Message --------
> Subject: Mail Delivery Failure
> Date: Sat, 03 Nov 2018 06:44:17 -0400
> From: Mail Delivery System <no-reply at directv.net> <no-reply at directv.net>
> To: fowler63 at alumni.princeton.edu
>
> This message was created automatically by the mail system (ecelerity).
>
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
> >>> viv8 at aol.com (while not connected): 554 5.4.7 [internal] exceeded max retries without delivery
>
>
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