On June 7, 2017 we wll be moving to a new anti-spam service - please see Anti-Spam Changes Coming June 7, 2017 for more information.

The Anti-Spam service is used to reduce the volume of spam that email users receive. Email marked with the pound sign (e.g., spam?#) indicates the likelihood that a message is spam. More pound signs (#) indicates a higher likelihood that a message is spam.

By default, email with a spam probability of 90% or greater will be returned to the sender with a message indicating that the message was blocked. You may change the default and select the spam level acceptable to you. You may completely opt-out of the service, continue to have spam marked and delivered with the pound sign designation, or you may choose to block messages that are spam-rated at different thresholds.

To select your spam threshold, contact the ITS Help Desk.

If you have received a message you believe is spam that did not get marked as such, see instructions on reporting it to the ITS Help Desk.

Below are the explanations of each setting:

Spam Setting Description

High Spam Rejection (This means you are allowing LESS spam to come through the filter.)

Reject spam with a probability of 70% or higher, tag and deliver rest. Please mark all spam below that level with the traditional pound (#) sign format.

Medium Spam Rejection (DEFAULT)

Reject spam with a probability of 90% or higher, tag and deliver rest. Please mark all spam below that level with the traditional pound (#) sign format.

Low Spam Rejection (This means you are allowing MORE spam to come through the filter.)

Reject spam with a probability of 99% or higher, tag and deliver rest. Please mark all spam below that level with the traditional pound (#) sign format.

Tag and Deliver

No spam rejection. Please mark all spam with the traditional pound (#) sign format. All messages will be delivered to your inbox. 

Opt-Out

Do not reject or mark any of my spam. All messages will be delivered to your inbox. None will be tagged. 

Notes:

  1. E-mail sent directly to your @iowa.uiowa.edu address will be rejected if the SPAM probability is 80% or higher.  Individual preferences cannot be set for @iowa.uiowa.edu addresses.
  2. The default for Shared/Departmental Email Accounts will be to continue to flag potential Spam with # signs and deliver them (tag & deliver). To change the spam threshold setting for Shared/Departmental Email Accounts, contact the ITS Help Desk.
Spam #s Probability Rating %
###### (6) 100
##### (5) 99
##### (5) 90-98
#### (4) 80-89
### (3) 70-79
## (2) 60-69
# (1) 50-59
none 0-49

For more information regarding IT security issues, see IT Security.

Article number: 
1353
Last updated: 
May 18, 2017