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Help and Resources: Catmail

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Logging in & out of Catmail

One of my devices won't let me login to my email or calendar.

 How do I log out of OWA?

 Click your profile picture icon in the top right of the window and select Sign out. If you have not set a profile picture, the icon will be your initials.

To be sure that you are safely logged out, OIT recommends closing your browser completely, especially if you are in a computer lab or kiosk.











I can't log in to Catmail.

Email address as username

You must use your full OhioID@ohio.edu email address instead of just your Ohio ID when signing into a Microsoft service like Catmail.

Safari on Mac OS

If you repeatedly get sent back to the login page when using Safari on Mac OS to access Catmail, try using a different browser like Chrome or Firefox.

How do I access shared resources and departmental mailboxes?

Accessing a shared resource on Catmail


Substitute the shared/departmental mailbox address for the "email@ohio.edu" placeholder in the above URL and then use your own OHIO ID and password to log in.

Sending emails & mass emails

How do I forward a message as an attachment?

If the Service Desk or IT security office asks you to forward a message to abuse@ohio.edu, the best way to do so is as an attachment.

What are the maximum recipients & messages per day?

To help deter spamming, the following limitations are placed on:

  • The combined number of To, Cc, and Bcc recipients a single email can have. If you send an email to a large number of people, you may receive an error message indicating that your email was not delivered.
    • If you need to send a one-time message to a large number of people, please use our Mass Mailings service. (Please allow up to five days for your request to be processed.)
    • If you have a regular need to send emails to predefined groups of people, distribution groups and listservs allow you to send a message to a single email address that then distributes the message to the entire group:
  • The number of messages your account can send in 24 hours.
    • If your account is flagged as having sent a suspiciously high number of emails, Microsoft will block your account from sending additional emails for 24 hours, but you will still be able to receive email. We do not have any way to override this block, and you will need to wait for Microsoft to re-enable your access.

What is the message/attachment size limit?

Maximum message size is 25 MB, including attachments.  If you try to send something larger, the message will be rejected.  If you are sending to someone outside the university, we recommend staying under 15 MB. If you need to send something larger than this, upload the file to OneDrive for Business or Filelocker and send your recipient a link to that file.

What are restricted attachment file types?

Catmail will not accept executable file types as an attachment.  This restriction also applies to executables stored inside zip files and other compressed archives.  If you need to share an executable file, use a cloud storage service like Filelocker or OneDrive.


Managing your folders & clutter

How do I import PST/OLM files into Outlook?

If you have archived messages stored in PST or OLM files, you can import those into Catmail.


"Search Folders" feature requires Outlook

If you have any Search Folders configured for your account, you will need to use Outlook to access those folders.  Microsoft does not support Search Folders in OWA. 


How often do I need to empty my Junk folder?

We recommend checking and emptying your Junk folder every 30 days. 

Syncing Catmail across devices

Using your OHIO email address with other Microsoft services

If you use your OHIO email account to sign up for a Microsoft consumer service like Xbox Live, please keep in mind that your password for services like Xbox Live will not be synchronized with your OHIO password.  Also, if your OHIO account is ever disabled, you may lose the ability to reset the password on any personal Microsoft accounts tied to that email.

 Mac Mail & iCal sync problems

 Deleting and re-adding your email account profile can fix many common issues with Mac Mail:

  1. Open Mail, go to the Mail menu and choose Preferences.
  2. Go to the Accounts tab, select your OHIO Exchange account's entry in the left side navigation pane, and click the minus sign (-):
  3. If you were syncing more than just mail, you may receive a notice telling you to use Internet Accounts.  Click Internet Accounts to continue, otherwise skip to step 5.
  4. Once the Internet Accounts window opens, choose your Exchange account and click the minus sign (-) to remove it.
  5. Once Mail finishes removing your old account settings, return to the left side navigation pane and click the plus sign (+) to add a new account.
  6. Choose "Exchange" as the account type and click Continue.
  7. Enter your account details:
    • In the Name field, enter your name as you want it to appear in the "From" field of your outgoing messages.
    • In the Email Address field, enter your OHIO e-mail address (yourOhioID@ohio.edu).
    • In the Password field, enter your OHIO password.
    • Click Continue.
  8. If prompted, choose which features you wish to sync with your OHIO account:
Managing storage & deleting/restoring items

How do I check my quota?

To see how much of your 100 GB quota you are using:

  1. Log into https://catmail.ohio.edu using a web browser.
  2. Click the gear icon in the upper right and click View all Outlook settings
  3. On the left side, click "General" and then click "Storage"
  4. Your quota information will be shown

How do I recover a deleted item?

Deleted items can be recovered from Catmail's dumpster for an additional 14 days after being purged from your Deleted Items folder.  To recover deleted items:

  1. Log into your account using either OWA or Outlook.
  2. Click your Deleted Items folder and then click Recover Deleted Items from this folder.
  3. Select the item or items you wish to recover.
  4. Click the Recover button.

What are deleted Items auto purge?

On Catmail, Deleted Items older than 30 days are automatically purged.  Purged messages can still be recovered for an additional 14 days through Outlook on the Web:

  1. Login to catmail.ohio.edu using a web browser.
  2. Follow these steps to recover deleted items in Outlook on the Web.


Catmail account settings & privacy

Can I keep my Catmail account after I leave Ohio University?

STUDENTS & ALUMNI: If you graduate from the university, you may keep your Catmail account indefinitely. If you leave the university for another reason, your access may be terminated once you are no longer eligible to register for classes.

CURRENT EMPLOYEES: You will have access to your employee Catmail account as long as you are employed by the university.  Once you stop working for the university, your access will be disabled.  Exceptions include:

  • Adjuncts who only are under contract during portions of each year can arrange for access to persist between contracts.
  • Employees who also are taking classes have two separate Catmail accounts.  Their student account will be covered by the "students" policy.
  • Employees who are also alumni of the university will have both an employee account and an alumni account.  The alumni account will remain active regardless of employment status.
  • Retirees and Emeriti will retain access indefinitely.

RETIREES and EMERITI: You will have access to your Catmail account indefinitely.

SPONSORED GUESTS: You will have access as long as your sponsor approves your account.

Will the University sell my email address?

Ohio University does not sell email address lists, and our contract with Microsoft does not allow them to sell your address or information or to advertise their services to you; however, we are required by Ohio public records law to provide "directory" information to those who request it. 

Students may choose to have their directory information withheld. Students that know their OHIO ID and password may log into the MyOHIO Student Center to change their privacy settings. In the MyOHIO Student Center click on My Personal Information. Using the drop-down box select Privacy Settings and click the double arrows. Click on Edit FERPA/Directory Restrictions, click on Restrict All Fields, and click Save.

Students that do not know their Ohio ID and password may choose to have directory information withheld by completing a Confidentiality Status Request Form. Once completed, signed, and dated, return the form to the address or fax number provided at the bottom of the form.

Please keep in mind that a Confidentiality Request will completely hide your presence at the university. When you send emails, the “from” address will not include your name and no one will be able to look you up using Catmail’s built-in address search.

How do I change my name in Catmail?


Catmail uses your official name from your student records. It will display your preferred name, if you have entered one through the My OHIO Student Center. If you have not provided a preferred name, it will display your legal name.

You can update your preferred name and/or pronoun in My OHIO Student Center. After logging in, click on the "Names" link in the Personal Information section. For more information, visit the Registrar's Preferred Names FAQ.

To change your legal name, you will need to contact the Office of the University Registrar.  A legal name change requires an official document and/or court order verifying the correct information at the time the request is made. You can submit one of the following forms of validation in person, to the Office of the University Registrar, Chubb Hall:

  1. Valid passport (required for international students in non-immigrant status);
  2. Court action document;
  3. Divorce decree (the appropriate page of the decree);
  4. Marriage certificate;
  5. Valid driver's license and social security card (you must submit both and the names must match);
  6. Federal or state-issued identification card and a social security card (you must submit both and the names must match).

When only one word is provided for the legal name, the information will be stored in a system's last name field with the standardized designation of 'FNU' (first name unknown) stored in the first name field.

If you have additional questions about name changes, contact Registrar Services by email at registration@ohio.edu, by phone at 740.593.4495, or in person on the first floor of Chubb Hall.


You can change your first name in Catmail by filling in the Preferred Name field in the University's HR database:

  1. Log into My Personal Information.
  2. Expand the My Personal Information folder and click Personal Information.
  3. In the Basic Details section, click Update.
  4. Choose Correct or complete the current details.
  5. Enter your preferred first name in the Preferred Name box and click Next.
  6. Continue to click Next until you reach the Personal Information: Review screen.  Make sure your Preferred Name is correct, and click Submit.

Changes will not be immediately visible in the Exchange GAL (Global Address List or address book), but will be refreshed automatically the following morning between 4:00 AM and 5:00 AM.