Forum Discussion
Undeliverable:???
- Jul 13, 2022Update(?): I read somewhere there is an update in progress, which will go through July 15, 2022. I will have to wait until after that date and check again. MEANTIME, though, I (LUCKILY) have another source to send, reply to, and forward(?) messages. Inconvenient, but at least "it" is there!
If you are getting sent to one address in two mailboxes, either the outlook mailbox is forwarding to Gmail or Gmail is configured to go out and get mail.
In each account, check settings - in outlook on the web, its Outlook.com's Settings (gear icon) > View all Outlook settings > Mail - Rules and Forwarding. In Gmail its under the POP/IMAP/forwarding section in Settings.
As for the spam - your messages are being converted to RTF format. That can cause some filters to reject it.
>> Content-Type: application/ms-tnef; name="winmail.dat"
Are you using Outlook desktop or Outlook on the web to send?
When addressing mail, when the address comes up in the autocomplete list, delete it then select it from contacts.
Note: delisting is for your mail server IP - if you are using Outlook.com, you cannot delist it.
Can you explain what settings in Outlook led to such outgoing mail blocking?
" And underneath, it reads: "Remote Server returned '550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)' " "
- Jul 08, 2022Best guess: messages with winmail.dat files are being identified as spam, possibly because its a .dat file. It could be because the filters can't scan the winmail.dat file and it may contain an infected attachment.
If you are using HTML message format and send a meeting invite in outlook format, the autocomplete entry for the address is updated to use RTF. All future messages may be sent RTF until you delete the autocomplete entry.
If using Outlook desktop, you can set a registry key to prevent using RTF.
https://www.slipstick.com/problems/outlook-is-sending-winmail-dat-attachments/#fails- A1-A1Jul 08, 2022Gold Contributor
Thank you
I understand, but why the user after many years, suddenly without changing the settings, is blocked?
Plain text (not HTML) won't do that.
However, I guess that this was caused (reports - spam) by other users -> this is a big problem for the sender of the mail!'