Google Message Security for Google Apps Administration Guide User Manual
Page 265
Approved and Blocked Sender Lists
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Troubleshooting: Approved/Blocked Senders and Mailing Lists
Why is it that some obvious spam messages are occasionally allowed through
the filters?
Spammers commonly forge sender addresses from popular domains in attempts
to bypass filtering. These may be approved senders you added, or approved
senders that were pre-populated for your organization. You may wish to modify
the lists for your organizations to remove these approved senders. Be sure to
modify any organizations that contain your users.
If an email address meets the criteria of both the approved and blocked senders
lists, which one takes precedence?
The blocked senders list takes precedence in the case of a conflict. Say, for
example, an email is from
. If
is on the
approved senders list, but
domain.com
is on the blocked senders list, then the
message would be blocked, as would all messages sent from
domain.com
.
When adding a new address to one of my blocked/approved senders or
approved mailing list, I receive the following error: “You currently have too
many addresses in your list. Try deleting old addresses which are no longer
used to free up more space and then try saving your address”. Why does this
message appear?
The list size is 4000 characters for each approved/blocked sender list and 1000
characters for the approved mailing list. You may consider adding an address
from an user's list to the appropriate organization list to improve filtering for your
user population, while freeing up space for the user.
For each address entered, you need to add an additional 2 characters to get an
accurate count.
As the service regularly improves filtering, many addresses in a blocked sender
list may no longer be necessary.
How does adding a particular address to the approved mailing list allow
messages with similar addresses to pass through?
The approval mailing list looks for a substring in the list of recipients. For example,
adding [email protected] to a user’s approved sender list automatically approves
other messages that include “al”, such as:
...