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Re: email lacks sender address



On Wed, Apr 27, 2022 at 08:28:27AM -0400, Greg Wooledge wrote:
> On Wed, Apr 27, 2022 at 08:05:46AM -0400, Haines Brown wrote:
> > If I understand correctly, which is always in serious doubt, it is 
> > exim that constructs the Sender: line by combining /etc/mailname and 
> > $LOCALHOST. Is this so?
> > 
> > These values are present:
> > 
> >   $ nano /etec/mailname
> >   lenin.histomat.net
> 
> Obvious typo.  This means you are not pasting results directly from a
> terminal into an email.  Instead, you're re-typing them, and making
> tons of errors in the process.  That makes it super hard to know what
> is actually real.

I apologize for the errors. I had just arisen and not yet had my 
coffe. Also as I approach 90 I make more typos. My eyesight is not so 
sharp and my fingerwork don't behave as well.

> > However I'm not clear whether the field is empthy or that what us 
> > in it field is not owned by me. I have popcorn installed, and it has 
>
> popcon, not popcorn.
> 
> > root send a priodidic message. The mail server does not recognize 
> > the root@histomats.net address. It sends me this message:
> 
> *Which* mail server?  Who is "it"?

A company named Omnis provides me with an email account. I presume it 
fumctions as a mail server and does my own machine. The error message 
below came from the former. I simply pasted it.

> >   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:
> > 
> >     survey@popcon.devuan.org
> >     host mail.guardedhost.com [216.239.133.245]
> >     SMTP error from remote mail server after pipelined sending data block:
> >     553 5.7.1 <root@histomat.net>: Sender address rejected:
> >     not owned by user brownh@historicalmaterialism.info
> > 
> >     Reporting-MTA: dns; lenin.histomat.net

> So, this message was generated by your own MTA running on your own
> computer, after the message was rejected by the receiving MTA.

No. This the mesage sent by the receiving MTA, Omnis.

> There are many things I do not understand in this error message.  For
> starters, who or what is "host mail.guardedhost.com [216.239.133.245]"
> and what do they have to do with anything?

That is the address, less a port number, required by the Omnis server 
for incoming email messages.

> It sounds like something on *your* end.  Maybe you've configured your
> MTA to use a smarthost,

Yes, I did. In exim4 confguration I selected "mail sent by smarthost; 
received via SMTP or fetchmail". I assume the Omnis mail server 
accepts mail using the SMTP protocol.

> and mail.guardedhost.com is your smarthost?

No, that is recipient address provided by Omnis less a port 
number. I send outgoing email to it.
 
> And if so, it's refusing to relay mail from you as long as you claim
> to be root@histomat.net instead of brownh@historicalmaterialism.info
> or something.

Yes, so it appears. However, popcon has always sent periodic mail 
presumably from root without this problem.

> Also, you appear not to be using Debian, so... all bets are off.

Don't my headers show that I'm using Devuan? Devuan is simply Debian 
without systemd.


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