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Groups > comp.os.linux.networking > #2775

Re: ping Moe Trin

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On 06/03/14 08:19, buck wrote:
> Moe Trin <ibuprofin@painkiller.example.tld.invalid> wrote in
> news:slrnlhfl3f.cij.ibuprofin@fermi.phx.az.us: 
> 
>> On 5 Mar 2014, in the Usenet newsgroup comp.os.linux.networking, in
>> article <slrnlhf8fq.81f.grahn+nntp@frailea.sa.invalid>, Jorgen Grahn
>> wrote: 
>>
>>> Thad Floryan wrote:
>>
>>>> buck wrote:
>>
>>>>> I am searching for an RFC that says an Email header may contain a
>>>>> blank SENDER.  I'm sure I read that the SMTP server must not 
> reject
>>>>> messages  where the SENDER is blank, but darned if I can find it
>>>>> now.
>>
<snip>
>> So "buck", care to clarify the question?
>>
>>         Old guy
>>
> 
> Let me read the RFCs referenced in replies to my question, after which 
> I
> will reply more carefully. 
> 
> Meantime, from a moral standpoint I wish to insist that if the sender
> refuses to identify that I may discard the message without having
> violated any internet standard. -- 
> buck
> 

If you are setting up an SMTP server, you are allowed to make your own
rules - you just can't justify non-standard rules by claiming they
violate the standards.  It is fine - and normal practice - for a server
to implement stricter rules than the standards say.  For example, you
can reject mails that based on sender or receiver addresses, or sizes,
or attachments, or message contents (such as spam or malware).  It is
perfectly reasonable for you to reject mail that does not have a sender.
 (Note, of course, that having a "sender" field does not mean the
incoming mail is being honest about the sender.)

If you are /writing/ an SMTP server, then perhaps you should at least
allow the administrator an option to let the server accept emails
without a sender if you want to say it fully supports all relevant
RFC's.  But I don't think it is unreasonable for this option to be off
by default.

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ping Moe Trin buck <buck@private.mil> - 2014-03-05 19:26 +0000
  Re: ping Moe Trin Thad Floryan <thad@thadlabs.com> - 2014-03-05 13:44 -0800
    Re: ping Moe Trin Jorgen Grahn <grahn+nntp@snipabacken.se> - 2014-03-05 22:15 +0000
      Re: ping Moe Trin Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2014-03-06 01:50 +0000
        Re: ping Moe Trin buck <buck@private.mil> - 2014-03-06 07:19 +0000
          Re: ping Moe Trin David Brown <david.brown@hesbynett.no> - 2014-03-06 09:38 +0100
          Re: ping Moe Trin Richard Kettlewell <rjk@greenend.org.uk> - 2014-03-06 09:54 +0000
          Re: ping Moe Trin William Unruh <unruh@invalid.ca> - 2014-03-06 17:43 +0000
        Re: ping Moe Trin Rick Jones <rick.jones2@hp.com> - 2014-03-06 19:23 +0000
          Re: ping Moe Trin buck <buck@private.mil> - 2014-03-06 20:33 +0000
            Re: ping Moe Trin Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2014-03-07 02:52 +0000
              Re: ping Moe Trin "Charlie Gibbs" <cgibbs@kltpzyxm.invalid> - 2014-03-07 14:09 -0800
                Re: ping Moe Trin Jorgen Grahn <grahn+nntp@snipabacken.se> - 2014-03-08 20:58 +0000
                Re: ping Moe Trin Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2014-03-09 01:53 +0000
          Re: ping Moe Trin Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2014-03-07 00:22 +0000

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