> On 09.05.2024 at 20:21 Jarland Donnell via mailop wrote: > > Quick question for you experts. What do you find to be the most common root > cause for reports of emails not being received by Office 365 domains, when > you can confirm conclusively that Microsoft accepted the email? Obviously > spam folder delivery should rank high, but what else? Are there admin > settings for Office 365 organizations that result in emails being accepted by > their servers but not delivered to the recipients? Maybe quarantined > somewhere?
To add more details to the already given answers based on my limited experience. It’s a little bit more complicated: - There is a spam folder in the mailbox of the recipient, called „Junk“. This folder is accessible by the recipient, but many people do not actively monitor it. The recipient does not get notified about new emails in the Junk folder. - There are quarantines which are accessible by the recipient via a separate website. - There are quarantines which are not accessible by the recipient. Which quarantines are accessible and which are not depends on the settings configured by the tenant administrator and cannot be determined from outside. - The difference between the Junk folder and the different quarantines is that dangerous messages which contain malware or phishing links are supposed to end up in one of the quarantines, whereas plain spam messages should go to the Junk folder. Of course all of them can and do contain false positives. - There are spam filters which move messages into hidden folders. While those messages theoretically end up in the recipients mailbox, they cannot see or access them, as long as they don’t mess around with the API. - In the end, messages can also be dropped. Those are not accessible anymore by anyone. Trying to offer support for employees of another company, where you have no insight into their IT landscape, is always difficult. I‘d give them the timestamp and ID under which their MX accepted and acknowledged the message. From there on their IT support should take over. — BR Oliver ________________________________ dmTECH GmbH Am dm-Platz 1, 76227 Karlsruhe * Postfach 10 02 34, 76232 Karlsruhe Telefon 0721 5592-2500 Telefax 0721 5592-2777 dmt...@dm.de<mailto:dmt...@dm.de> * www.dmTECH.de<http://www.dmtech.de> GmbH: Sitz Karlsruhe, Registergericht Mannheim, HRB 104927 Geschäftsführer: Christoph Werner, Martin Dallmeier, Roman Melcher ________________________________ Datenschutzrechtliche Informationen Wenn Sie mit uns in Kontakt treten, beispielsweise wenn Sie an unser ServiceCenter Fragen haben, bei uns einkaufen oder unser dialogicum in Karlsruhe besuchen, mit uns in einer geschäftlichen Verbindung stehen oder sich bei uns bewerben, verarbeiten wir personenbezogene Daten. Informationen unter anderem zu den konkreten Datenverarbeitungen, Löschfristen, Ihren Rechten sowie die Kontaktdaten unserer Datenschutzbeauftragten finden Sie hier<https://www.dm.de/datenschutzerklaerung-kommunikation-mit-externen-493832>. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
