There is a limit (29 KB) to how large a distribution list stored on the server can be.
Distribution lists are saved lists of email addresses for use when sending a message to a
number of recipients. Generally, personal distribution lists will be stored in your personal Contacts list on the Microsoft Exchange server.
The limit for distribution lists stored on the server, is based on the size of the individual
contacts, not the number of contacts. Each distribution list can not exceed 29KB. This
limit applies whether the members of the distribution list are selected from your Contacts
folder, entered as full email addresses, or selected directly from the Global Address list
(GAL). Any single distribution list cannot exceed 29KB.
If you use very basic information for each contact (for example, only the name and the email address), your distribution list limit may be as high as 125 to 130 contacts.
If you have additional information on each contact (address, phone/fax numbers, birthdates, etc.), your distribution list limit may be significantly lowered.
