Sendmail- Is this correct.?

[Mark Sargent]

Paul Howarth wrote:

> Mark Sargent wrote:
>
>> Mark Sargent wrote:
>>
>>> Paul Howarth wrote:
>>>
>>>> On Mon, 2005-04-11 at 16:04 +0900, Mark Sargent wrote:
>>>>  
>>>>
>>>>> Hi All,
>>>>>
>>>>> I am giving this a whirl on a machine at work. I've set it to use 
>>>>> our provider to relay(right terminology.?) Ok, I set up an account 
>>>>> in Evolution that uses smtp:localhost.localdomain and sent a mail 
>>>>> to myself. I then checked with Thunderbird to see if the mail was 
>>>>> successful, but, nothing. I'm sure I've missed something very 
>>>>> fundamental. Below is the only section I changed in my .mc file,
>>>>>
>>>>> dnl define(`SMART_HOST',`smtp.feel.to')
>>>>>
>>>>> Anything else need adjusting/tweaking..? Cheers.
>>>>>   
>>>>
>>>>
>>>>
>>>>
>>>> You need to delete the "dnl", which means "delete to new line". It's
>>>> m4's way of commenting things out.
>>>>
>>>> Paul.
>>>>  
>>>>
>>> Hi All,
>>>
>>> thanx Paul. Paul, is there a way to confirm that the sendmail.cf is 
>>> now sending via smtp.feel.to as the test mail is still not 
>>> arriving..? Cheers.
>>>
>>> Mark Sargent.
>>>
>> Hi All,
>>
>> ok, I checked /var/log/maillog and found this,
>>
>> Apr 11 16:51:06 localhost sendmail[7896]: j3B7p5JJ007893: 
>> to=<powderkeg at snow.email.ne.jp>, 
>> ctladdr=<coolboarderguy at localhost.localdomain> (500/500), 
>> delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=120395, 
>> relay=sv.feel.to. [211.10.15.172], dsn=2.0.0, stat=Sent (j3B7oLl09915 
>> Message accepted for delivery)
>>
>> That looks like success from my end, yes..? But, it's not reaching my 
>> inbox for the address I'm mailing to. Anything I should be double 
>> checking with this..? Cheers.
>
>
> Your mail server is sending out mail with a bogus from: address of 
> coolboarderguy at localhost.localdomain. No sensible mail server will 
> accept mail from unresolvable domains like that. You need to use a 
> real domain name. Look up masquerading in /usr/share.sendmail-cf/README
>
> Paul.
>
Hi All,

Paul, I have read this section at the tutorial site,

You can have your host masquerade as another by using this macro:

        MASQUERADE_AS(`host.domain')

Masquerading is a very important part of a client/server mail hub 
configuration. Any machine configured like this will rewrite the SMTP 
From: header of all outbound mail to look like the message came from the 
address you're masquerading as. This address /must/ be an address record 
in DNS, not simply a CNAME, or the remote end will canonicalize the 
address back to the original name.

and was wondering, as it's a requirement to have the address in a DNS 
record, does this have to be a registered domain name, as we don't have 
1. If no, then I can just masquerade as anyone(not that I really want 
to)..? Our router is our DNS, so we would have to add this record to it, 
yes..? Sorry for the mundane questions. Cheers.

Mark Sargent.