[MlMt] Is this MM or the reciever?

[Bill Cole]

On 22 May 2019, at 10:02, Annamarie Pluhar wrote:

> I got this bounce back
>
> andrea at andreapluhar.com>: host mail.andreapluhar.com[162.215.248.172] 
> said:
>     550-Please turn on SMTP Authentication in your mail client, or 
> login to the
>     550-IMAP/POP3 server before sending your message.
>     550-st43p00im-ztdg10073201.me.com [17.58.63.177]:59104 is not 
> permitted to
>     550 relay through this server without authentication. (in reply to 
> RCPT TO
>     command)
>
> I do have SMTP authentication on.

This looks like a record of an unsuccessful SMTP conversation between an 
Apple mail system (hostname st43p00im-ztdg10073201.me.com, IP 
17.58.63.177) and a server it is calling mail.andreapluhar.com at IP 
162.215.248.172 (whose proper name is shared34.accountservergroup.com.) 
The Apple mail system was apparently attempting to send a message to 
andrea at andreapluhar.com, an address which the receiving server did not 
consider local. Generally speaking, mail servers do not accept email 
which they would need to  relay to another system except for 
authenticated clients.

Full raw headers of the bounce and the original message that should have 
been returned as an attachment to the bounce would help in figuring out 
WHY that transaction was attempted. My ***GUESS*** is that you sent mail 
using an iCloud account (or to an iCloud account which is configured to 
forward mail) to andrea at andreapluhar.com, but that the mail system which 
was supposedly responsible for handling mail for the andreapluhar.com 
domain at that time (i.e. according to DNS) was not configured to 
perform that handling.

Interestingly, the DNS for andreapluhar.com right now directs mail to a 
different host on the same network, using a technically improper 
mechanism (it's a bit down in the tech weeds: the MX record points to an 
alias rather than a name with an A record...)



-- 
Bill Cole
bill at scconsult.com or billcole at apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire