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Re: Finding a replacement for my ISP's smtp server

On 7/29/2014 11:06 AM, Brian wrote:
> On Tue 29 Jul 2014 at 10:31:23 -0400, Jerry Stuckle wrote:
>> On 7/29/2014 9:47 AM, Brian wrote:
>>> No, I do not think that. I think that if the remote MTA accepted the
>>> mail then the remote MTA accepted that mail and can prove it.
>> This is where you are incorrect.  All you know is the MTA accepted the
>> email.  You have no idea what the MTA did with the email after that.
> It's entirely correct. Of course I've no idea what the accepting MTA
> does with the mail. I do not control it.
> Try this for a reasonable analogy: I post a letter through the door of
> your house. I know it was delivered and accepted - otherwise it wouldn't
> have gone through the letterbox. My responsibility is at an end.
> What happens on the other side of the door and whether the recipient
> gets the letter is between you and your dog.

No, it's more like when you place the letter in the post office box.  It
would get to their door when their MUA receives it from the MTA.
Between the two, any number of things can happen.

>>> The recipient not getting the mail is an issue for her not me. She can
>>> claim the dog chewed it up or that a spam trap eat it. What she cannot
>>> claim is that it wasn't delivered to her designated place. If she did
>>> not get the mail (technically it has been received) she will need to
>>> investigate her own network and her ISP's.
>> Yes, she can.  All YOU can claim is it was delivered to her MTA.  You
>> can NOT guarantee it was delivered to her.  There are many reasons
>> (valid and invalid) that can cause this.
> Please see above. The reasons don't concern me, whatever they are.

But you stated earlier you wanted to know that she got the message.  I'm
just pointing out you can't guarantee that, even if you run your own MTA.

>> And in any case, the exact same argument occurs when you use your ISP's
>> MTA.  The only difference is you're more likely to get the email
>> delivered to the MTA.
> Delivering mail is identical for me and my ISP. There is no magic
> involved.

Then there is no reason not to use your ISP's MTA.

>>> No need to prove it; my ISP regularily inspects my network. 10/10 every
>>> time and a 15 year unblemished record.
>>> You won't find my small network here
>>>   http://www.spamhaus.org/statistics/networks/
>> Not now.  But that does not mean your record will REMAIN unblemished.
> The killer blow?

It can (and does) happen.  Every day.

But as I said - it's not ME you have to convince.  It's your ISP.  And
if your ISPs are anything like the ones we have here, they couldn't care
less.  They block outgoing port 25, no matter how many safeguards you
have on your system.


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