When people outside of your organization send you email, their email systems don't double-check where to send that email every time. Instead, their systems save the location of your email system based on a setting in your DNS server known as a time-to-live (TTL). If you change the location of your email system before the TTL expires, the sender's email system tries to send the email to the old location before determining that the location has changed. This can result in a mail delivery delay. One way to avoid this is to lower the TTL that your DNS server gives to servers outside of your organization. This will make the other organizations refresh the location of your email system more often.
When malware is detected in any attachment, select whether to delete the entire message or to delete all message attachments. ...
When Office 365 tried to send the message to the external receiving server, that server performed a reverse DNS (rDNS) lookup ...
When OutlookEnableSpoofyEmails=1 as a policy in the registry and your Outlook profile is in Online mode, your client may ...
When people outside of your organization send you email, their email systems don't double-check where to send that email ...
When people outside of your organization send you email, their email systems don't double-check where to send that email ...
When published, labels appear in your users' apps, such as Outlook, SharePoint, and OneDrive. When a label is applied to ...
When published, labels appear in your users' apps, such as Outlook, SharePoint, and OneDrive. When a label is applied to ...
When setting up Office 365 with your domain, you need to configure external Domain Name Server (DNS) records including types ...
When the %BRAND_OFFICE_SHORT% Store is turned on in the app launcher, people in your organization can access the store using ...