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Policies: Limits for UTORlist Listserv This document describes the policy for limits of message size used with UTORlist Listserv mailing lists as of Jan 17, 2008. Specifications Maximum size of attachment allowed on a Listserv mailing list = approximately 30 MB[1] [1] Until Dec 4, 2007, attachments were not allowed with Listserv mailing lists. The policy was changed on that date, and since then, there is no Listserv imposed attachment restriction. The UTORmail post office limits messages to 50 MB maximum size. When attachments are encoded for email they tend to use approximately 1.37 times more space. (See http://en.wikipedia.org/wiki/Base64 for more information.) Hence the approximate maximum size of attachments in an email message is 30 MB. The Information Commons provides documentation and Help Desk (help.desk@utoronto.ca) support. The Network Service Group (network.services@utoronto.ca) provides technical infrastructure, technical support for departments, and manages the UTORmail, UTORschedule, UTORinfo, UTORnews and UTORlist.