Google Message Security Troubleshooting Guide - Manual (Page 10)

Frequently Asked Questions 11
Some tips are:
• Remember it is not necessary to add your complete contact list to these lists.
If you find messages from a particular good sender are getting quarantined,
put that sender on your Approved Senders list. The same is true for blocking
unwanted senders.
• The list’s size includes address white spaces and commas. A comma has 2
characters: a space and a comma. Add these additional characters to get an
accurate count of the list size.
• If you run out of space and attempt to add another address, you will receive
an error that is similar to:
List length limit (4000) exceeded
• To free up more space, delete addresses that are no longer used.
• You may consider adding an address from a user’s list to the appropriate
organization-level list to improve filtering for all users, while freeing up space
for that particular user.
• For batch commandline information, see “How do I edit my Sender Lists for all
of my users?” on page 18.
Why do I get a “too many addresses” error when I add
addresses to my Approved and Blocked Senders lists?
If you get this error, you need to edit the number of senders in your lists:
“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”,
• The list size is 4000 characters for each approved/blocked sender list and
1000 characters for an 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.
• Remember the list’s size includes address white spaces and commas. A
comma has 2 characters: a space and a comma. Add these additional
characters to get an accurate count of the list size.
• As the email security service regularly improves filtering, many addresses
which were previously placed in a blocked sender list at one point may no
longer be necessary.
What should I do when I attempt to add or remove an entry
from my approved or blocked sender list and I get an error?
If you are attempting to add or remove a user from your Approved or Blocked
Senders lists and you get this error, contact customer support.
“A request could not be completed because of a system error. Try
clicking “Back” on your browser and reload that page”.