Outlook 2016 Message-ID oddity/inconsistency?

Post number 7 has been selected as the best answer.

Rick441

Member
Outlook version
Email Account
POP3
I use Outlook 2003 with internet-mail only, namely a few Yahoo accounts, via POP3. I recently discovered that, for any email I send from Outlook (via Yahoo SMTP servers), the resulting unique message-id in the header ends in "…@[my local computer name].” I had expected it would end in "…@yahoo.com."

Now, my brother uses Outlook 2016 with a similar setup, namely a few Yahoo accounts, via POP3. Today I checked, and the header message-id for his sent mail does end in "...@yahoo.com" instead.

Is this difference to be expected simply because of Outlook 2003 vs 2016? If not, do you have any idea why my message headers would reveal my local computer name? And, in addition to a bit of privacy concerns, could this make my sent mail more likely to sometimes end up tagged as spam?

Thanks.
 

Rick441

Member
Outlook version
Email Account
POP3
No ideas? If there are any Outlook internet mail users out there (IMAP or POP3), could you just check the value for "message-id" in the header on any sent email and report back as to whether it has a domain or a local computer name after the "@"? Thanks!
 

Vincenzo

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
IMAP
My hotmail-sent emails have dffgf4545g4.namprd88.prod.outlook.com at the end.

You might get more responses if you tell people how you are viewing the message id in the header.
 

Rick441

Member
Outlook version
Email Account
POP3
Thanks for the reply. Good point about explaining how to view the Message-ID in the header. In fact, it led me to discover you can't see Message-ID's, or any other headers, for Sent Mail in Outlook. Instead, the way to view headers for an email you sent is by bcc-ing yourself on it and then looking at it in your Inbox copy (or just send yourself an email just to test). (For those who need it, at the end of this post I have pasted part of a Microsoft document on how to view headers in Outlook.) I find that "Message-ID:" is usually toward the bottom of the header, near "To:" and "Date:".

The Message-ID of the email I received notifying me of Vincenzo's post is shown by this line from the headers:
Message-ID: <65fef27e150cebcc44ceb8f428e060a3@forums.slipstick.com>

That is the kind of Message-ID format I would expect, namely a long alphanumeric followed followed by "@" and then a domain. But again, I discovered that the Message-ID for emails I send from Outlook via Yahoo servers is instead a long alphanumeric followed by "@[my local computer name]" (instead of something like "@yahoo.com" or "@mail.yahoo.com"). Again, that is the reason for my question. It seems odd that my local computer name is being divulged (not that it's particularly worrisome in my particular case, because I don't think it would be meaningful or useful to anyone). But I'd still appreciate knowing if anyone else is seeing their local-computer name after the "@", instead of a domain. And any theories as to why that's what I'm seeing.

----------------

From: View internet message headers in Outlook

View internet message headers in Outlook​

Outlook for Microsoft 365, Outlook 2019, Outlook 2016, Outlook 2013, Outlook 2010, Outlook 2007

  • Double-click an email message to open it outside of the Reading Pane.
  • Click File > Properties.
  • Header information appears in the Internet headers box.
    Tip: You can highlight the information in that box, press Ctrl+C to copy, and paste it into Notepad or Word to see the entire header at once.

(For Outlook 2003, you can see the headers box by opening the message and choosing View, then Options).
 

Vincenzo

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
IMAP
I just realized my reply above was incomplete. It should have said that the address shown was "at the end of the message ID."

Which you probably realized I meant.

Anyway, I have tried to reproduce the odd message id you are seeing and cannot make it happen.

You seem to imply that it only happens when sending from Yahoo accounts? Are you just sending from Yahoo to Yahoo account? Can you vary from that?
And what if you send from the Yahoo web interface?

Have you tried setting up another type of account in your Outlook and sending from it to see if it still happens?
 
Last edited:

Rick441

Member
Outlook version
Email Account
POP3
My Yahoo emails are sent from Outlook to a wide variety of domains.

Good suggestion about testing a send from the Yahoo web interface. When I do that, the resulting Message-ID ends in "@mail.yahoo.com." (Not surprisingly, this is true whether the header is viewed in Outlook or on Yahoo's web interface.) This is, again, the kind of thing I would expect to see even when the email is sent via POP3 from Outlook instead.

I should also note that, while I haven't used it in awhile, I also have a Comcast email address and POP3 account in Outlook, sharing the same pst as the Yahoo accounts. Since I often bcc myself on emails I still have a lot of the emails that I sent via the Comcast SMTP server, and the Message-ID's for those also show my local computer after the "@". So it doesn't happen only with my Yahoo accounts.

Just as a reminder, I am using Outlook 2003. I wonder if Message-ID's might have been constructed differently in that version?
 

Rick441

Member
Outlook version
Email Account
POP3
I think you are right, it is an Outlook 2003 issue. Here is an article from 16 years ago

Thank you for that! I note that it also specifically discusses one concern I had (admittedly minor, since these are not business emails) that the domain-lacking, computer-name-exposing, Message-ID's on my emails might increase the likelihood that my emails end up flagged as spam.

In fact, my question originated during an email conversation I was having with a company's customer service, when my latest reply to them was returned by MAILER-DAEMON, and I noticed that the (to me mostly mumbo-jumbo) text showed my local computer name. (A couple other oddities were that (1) it also divulged what was apparently a personal email addresss (so-and-so@icloud.com) that was actually receiving the emails I was sending to customerservice@companyname.com; and (2) IIRC (and maybe I don't) it said something about violating *Yahoo's* rules.) Maybe this also explains why on rare occasion I have found a gone-missing bcc (as usual sent from Outlook 2003) in my Yahoo WebMail spam folder for that address.
 
Similar threads
Thread starter Title Forum Replies Date
T vba extract data from msg file as attachment file of mail message Outlook VBA and Custom Forms 0
S Unable to extract text from an Outlook email message Using Outlook 2
J Implement Keywords based on body message Outlook VBA and Custom Forms 0
C must select message to trigger safe list Using Outlook 3
witzker HowTo Change message Class of contact form Outlook VBA and Custom Forms 0
D.Moore VB script to Digitaly Sign newly created outlook message Outlook VBA and Custom Forms 2
O VBA Outlook Message Attachment - Array Index Out of Bounds Outlook VBA and Custom Forms 0
W September 2020 - No Default Email Client message after Office Update Using Outlook 1
A Flag Message for Follow Up after sending Outlook VBA and Custom Forms 1
S Outlook (2016 32bit; Gmail IMAP) - Save sent message to Outllook Folder Outlook VBA and Custom Forms 0
C Why won't Title display in message list? Using Outlook 1
icacream content in this message could not be downloaded.... Using Outlook 2
J Outlook 2016 After a search in all mailboxes, where is each message that was found? Using Outlook 6
R Warn before sending message Outlook VBA and Custom Forms 4
T Column to display which email alias a message was sent to Outlook VBA and Custom Forms 6
V Change start time based on message duration Outlook VBA and Custom Forms 2
J Message search and edit, another way? Outlook VBA and Custom Forms 4
N VBA to delete duplicates by message-id on common pst for 2 or more emails Outlook VBA and Custom Forms 0
S Create A Search Folder That Looks For Message Class? Outlook VBA and Custom Forms 0
M VBA to auto forward message with new subject and body text Outlook VBA and Custom Forms 8
T Missing text in e-mail message after "(Please keep confidential)" Using Outlook 3
C Custom Form (seperate layout pages and message reading pane) Outlook VBA and Custom Forms 0
C Create new Message with shared contacts & BCC'ing recipients Outlook VBA and Custom Forms 0
M Message list font changed after update Using Outlook 2
BretAB Is it possible to add a lookup field to a Message form? Outlook VBA and Custom Forms 4
D Unopened message in inbox deleted and not in deleted items Using Outlook 3
T Change the selected Message in the Outlook window Outlook VBA and Custom Forms 2
geofferyh Cannot get Macro to SAVE more than one message attachment??? Outlook VBA and Custom Forms 5
W Message class changes of a custom form changes to the default form Using Outlook 2
evdbogaard Reply with only last message cited Using Outlook 1
T O365 and Office Message Encryption Exchange Server Administration 2
S Custom Form, copy user field data to message body Outlook VBA and Custom Forms 12
D Outlook Message Window Changes Size and Position Using Outlook 1
N VBA Script to Open highlighted e-mail and Edit Message Outlook VBA and Custom Forms 5
R Retain Original Message When Forwarding With Macro Outlook VBA and Custom Forms 3
R Call a Public Sub when a Flag is clicked on in the Message Preview pane Outlook VBA and Custom Forms 1
C Macro to add multiple recipients to message Outlook VBA and Custom Forms 3
P Message List Font Changed Using Outlook 6
I Automating message move between folders Outlook VBA and Custom Forms 0
U Outbox Message Stuck after reading some MailItem Properties with VBA Outlook VBA and Custom Forms 1
e_a_g_l_e_p_i Is there a way to add something that is in the "Format Text" tab to the "basic Text" on the message tab Using Outlook 1
R VBA macro - new message Outlook VBA and Custom Forms 3
I How to display sender's name instead of email address in outlook 2013 message Using Outlook 5
B Search: Cannot find which Folder Contains a Message Using Outlook 3
J Outlook 2016 message content does not display - outlook.com; exchange Using Outlook.com accounts in Outlook 9
E Search for folder by key in subject then move new message to related folder Outlook VBA and Custom Forms 1
D Paste Excel table into Outlook message Outlook VBA and Custom Forms 6
W Message Text Using Outlook 1
P Unread Until Click Another Message? Using Outlook 2
N Saving And Deleting Outlook Attachments with Unknown Error Message Outlook VBA and Custom Forms 1

Similar threads

Top