FAQ

What are the message limits, policies, actions, etc. for campus mail servers?

The following limits and policies apply to the CITS maintained systems:

  • Exchange Online (hosting faculty, staff, and students)
  • GoogleApps@Umaryland (student email)

 

Exchange Online

GoogleApps@UMaryland

Anti-Virus

   

Anti-virus rules - infected message

Drop attachment and replace with text message

Quarantine message, no notification sent

Max message size to scan

30MB

30MB

Block/Allow lists

   

Blocked attachments

*.bat, *.cmd, *.com, *.cpl, DELETED0.TXT,
Deleted Attachment Report.txt, *.exe, *.inf, *.js,
*.pi, *.pif, *.reg, *.scr, *.vb, .vb?

Same as Exchange Online

Blocked subjects

none at this time

none at this time

Message Size Limit

   

Max message size*

30MB

30MB

Max # of Message sent**

500 per hour

 

* Users can send large email attachments using the Accellion Secure File Transfer Appliance.  Information about Accellion.

** Alternative solution is to use a mass emailing service (e.g. Sympa, Constant Contact, etc.).

What is my mailbox size limit?

Your account in Exchange Online is allocated 100 GB of storage space.

Please note, in order to use the Outlook Client Cache Mode, the local work station needs to have 5 GB of space available as well.

How long does Exchange Online Protection keep emails in quarantine?

30 days or until the email is released or deleted, whichever comes first.

Can I retrieve an email once it has been deleted from quarantine?

No. Once emails have been deleted from quarantine, they cannot be retrieved.

How many email addresses or domains can I add to my Safe Senders list or Blocked Senders list?

You are allotted 1024 entries to use in your Safe Senders list and 500 entries to use in your Blocked Senders list.

Can I increase the number of emails or domains I can block or allow?

No. Users are only allotted 1024 entries for their Safe Senders list and 500 entries for their Blocked Senders list. 

We suggest mainly using your Safe Senders list to ensure email you want is not put into the Junk folder. Spammers often will change the email address they are using to send SPAM, or they will spoof the email address they are using. As a result, adding an email address to your Blocked Senders list may not stop future SPAM.

How do I "turn off" Exchange Online Protection scanning on my email account?

The Safe Senders list cannot be set to allow all messages through its scan for a specific account.

The level of SPAM email filtering is set by the Email Administrators for each email domain on campus. If you think that the SPAM filtering level for your email domain is too strict or lenient, please contact your Email Administrator.

What should I do if I receive SPAM in my inbox?

Occasionally, Exchange Online Protection may not block a SPAM email message and that message will be delivered to your inbox.  If you receive an unsolicited email in your inbox, first determine whether it is SPAM email or just a bulk email message from a legitimate vendor.

If you have determined that a message is unsolicited SPAM email, send that message as an attachment to spam@umaryland.edu.  Do not forward the message or just the email headers. The email system administrators need to see the entire SPAM email in its original format.  Here's how:

In Office 365

To forward a message as an attachment, create a new message and drag the original message you want to forward into the new message.

In Outlook 2016 and 2013

To forward a message as an attachment, select the email and then in the Respond group, click More and then click Forward as Attachment. There’s also a keyboard shortcut you can use instead. Just select the message you want to forward and press Ctrl + Alt + F.

In Outlook 2010 and 2007

To forward a message as an attachment, select the email and then right click More Actions Forward as Attachment

In Apple Mail

To forward a message as an attachment, select the email and then select Message Forward as Attachment from the menu bar.

If you receive multiple and continuous SPAM messages from a specific email address or domain, you may want to add that email addresses to your Blocked Senders list manually. (Instructions on how to block an email address in Outlook client software | Instructions on how to block an email address in Outlook on the web). Please note that spammers often will change the email address they are using to send SPAM, or they will spoof the email address they are using. As a result, adding an email address to your Blocked Senders list may not always stop future SPAM.

I am getting undeliverable error messages for messages I did not send! What is happening?

Most likely your email address has been "spoofed."

Spoofing an email address is similar to writing a different return address on an envelope. It appears as though the letter or email was sent from a different address. When the SPAM message is sent to an invalid email address, you may receive the bounce-back error messages stating that a message could not be delivered. 

Spammers can "harvest" email addresses from many different public locations such as public webpages or online directories. Viruses or spyware also can infect a computer and harvest email addresses from address books stored on that computer. If you suspect that your computer has a possible virus, download updated virus definitions, run a virus scan, change your email password, and notify your computer support person.

I am seeing SPAM email from my own umaryland.edu email address! What is happening?

Most likely your email address has been "spoofed."

Spoofing an email address is similar to writing a different return address on an envelope. It appears as though the letter or email was sent from a different address. 

Spammers can "harvest" email addresses from many different public locations such as public webpages or online directories. Viruses or spyware also can infect a computer and harvest email addresses from address books stored on that computer. If you suspect that your computer has a possible virus, download updated virus definitions, run a virus scan, change your email password, and notify your computer support person.