I have no experience with Listserv rate limiting because we avoid the problem with networking and mail system configuration that includes a mail server ready to accept bulk deliveries.
On the multiply by 100 issue, ...
If your list is configured with "Mail-merge= yes", then Listserv generates a piece of mail for each of your 70,000 recipients. Otherwise, Listserv creates batches that are then sent to the mail system. 100 is a typical batch count, but your server could be setup with a different value. My server is setup for 250, because I know my mail servers will accept batches of up to that size. ... and fewer batches means more efficient operation.
Cheers, Wayne
Greetings Listserv admins,
We are running Listserv 15.5 and are thinking of employing rate limiting, and are having difficulty picking a number. Here are the numbers we do know:
Our largest list, comprising all faculty, staff and students, has roughly 70000 subscribers. After someone sent an 8M message to it we put on a size limit of 1 megabyte.
Our VMWare guru (Listserv is running in a virtual machine) tells me that pver the last day the peak outbound SMTP was about 2.5 megabytes per second. This would seem to suggest that the 12 mega-BITS per second given in the example in Lsoft's description of the feature would be about right to cut that peak in half. Maybe even less since it really was an isolated spike. Maybe 8....
However reading further I see that for purposes of this feature Listserv counts the size of messages by multiplying out the number of recipients. Given that the peak our VM guru saw would have been data packed into BSMTP batches of 100 recipients, does that mean we need to multiply that number by about 100?
Margaret King
IT Services - Messaging
Michigan State University
Office: 517-432-7324
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