Email Error: "Not Recognized as a Valid Sender"

This article applies to: Email for Faculty and Staff

This error message indicates that Microsoft has flagged your account as exhibiting spam-like behavior. See our Microsoft's Exchange Online Protection article for details and what to do about it.

Email for Faculty and Staff Articles

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FYI

All About Email Rules (Filters)

All email clients supported by CIT (and most email clients in general) have a feature called rules (sometimes called filters). Rules allow you to define certain conditions under which certain...

Cloud-Based Email and Calendar

Because Cornell’s email and calendar is a cloud service, in some cases only Microsoft has access to the settings and systems necessary for issue resolution. In these cases, details of the process...

Delivery to External Email Addresses

An increasing number of external email providers (like Google, AOL, Time-Warner, etc.) are using a policy (meant to stop fraudulent emails) that may prevent the delivery of forwarded messages.

Email Delays and Order of Receipt

Usually email flows smoothly between users, with delivery times of a minute or less. Like highways, only a certain amount of traffic can go at any one time. At peak times, traffic can clog the highways and cause delays. And sometimes you get stuck behind a convoy of trucks.

Email Error: "Meeting Out of Date"

Office 365 users report seeing repeated notices of "Your meeting was found to be out of date and has been automatically updated." This message appears to be the result of a...

Email Error: "Not Recognized as a Valid Sender"

This error message indicates that Microsoft has flagged your account as exhibiting spam-like behavior. See our Microsoft's Exchange Online Protection article for details and what to do about it...

Email Feature: Clutter

Microsoft is in the process of replacing this feature with Focused Inbox.

Email Feature: Focused Inbox

Microsoft is in the process of rolling out this filtering option to some versions of Outlook (during 2017-2018). Focused Inbox is replacing Clutter.

Email for Graduate and Professional Students

As a graduate or professional student, you have an additional option for your Cornell email -- an account on the university's Office 365 system.

Email: Spam Filtering and Junk Mail

Short version: Check your junk mail folder from time to time.

Faculty/Staff Email Account Size Limits

All faculty/staff Office 365 accounts have a 50GB mailbox. The vendor does not accept requests for larger mailboxes. How Full is My Mailbox? Outlook 2016 for Windows: Click the...

Find Your Missing Email

Missing email is one of the most distressing things that can happen to an email user. We get a number of such reports each month. This article describes what we've learned through helping people find their lost items.

Office 365 Direct Routing FAQ

Mail sent to Cornell Office 365 addresses (primarily faculty, staff, and retirees) is routed directly to Microsoft. This article covers questions about how differences since this change was made in October 2017. See also our Direct Routing Overview article.

Office 365 Direct Routing Overview

Mail sent to Cornell Office 365 addresses (primarily faculty, staff, and retirees) is routed directly to Microsoft. Before October 2017, it had been handled through a Cornell system first.

Rules for Meeting Invitations (Outlook 2011 for Mac)

One of our recommendations for Calendar Harmony is that you send meeting invitation updates to all participants on all changes. This article describes how to have all meeting related messages automatically filtered out of your Inbox and into a folder just for such messages.

Rules for Meeting Invitations (Outlook 2013 for Windows)

One of our recommendations for Calendar Harmony is that you send meeting invitation updates to all participants on all changes. This article describes how to have all meeting related messages automatically filtered out of your Inbox and into a folder just for such messages.

Rules for Meeting Invitations (Outlook 2016 for Mac)

One of our recommendations for Calendar Harmony is that you send meeting invitation updates to all participants on all changes. This article describes how to have all meeting related messages automatically filtered out of your Inbox and into a folder just for such messages.

Rules for Meeting Invitations (Outlook 2016 for Windows)

One of our recommendations for Calendar Harmony is that you send meeting invitation updates to all participants on all changes. This article describes how to have all meeting related messages automatically filtered out of your Inbox and into a folder just for such messages.

Rules for Meeting Invitations (Outlook on the Web)

One of our recommendations for Calendar Harmony is that you send meeting invitation updates to all participants on all changes. This article describes how to have all meeting related messages automatically filtered out of your Inbox and into a folder just for such messages.

Set Your Email Delivery Options

Faculty, staff, students, alumni, and retirees can have email addressed to their Cornell address delivered or forwarded in a number of ways.

Set Your Nickname or Other Name Preferences

Faculty and staff can use Workday to edit the way their name will appear in email messages and other campus systems.

Some Domains Hosted at Web.com

When suspicious email traffic is detected, a mail provider may block all messages coming from that domain. Sometimes this happens to Cornell email.

What Is My Email Address?

Once you have a NetID and you have set a mail account using Who I Am, people can email you using the form NetID@cornell.edu. For example, if your NetID is dxl404, people can email you at dxl404@...

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Email Error: "Not Recognized as a Valid Sender"

Email for Faculty and Staff Articles

FYI

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