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See also the Postfix Performance Tuning page at http://www.postfix.org/TUNING_README.html.
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Initial content taken from a group of messages on list with first in thread at http://mail.python.org/pipermail/mailman-users/2001-December/016271.html - this needs further editing. Nearly all content was from messages by Dan Wilder |
As lists get larger, Postfix delivery with out-of-the box configuration really slows down. The bottlenecks I've found are queue length and number of SMTP processes, both of which default to values too small for large lists. I began noticing pretty severe rate limiting at about 10,000 deliveries on a list.
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