we recently moved a listserv application from a university to a dedicated server at a commercial hosting provider (not linode). The provider requires us to use their SMTP relay, and they limit the number of relays per day. This is a very active listserv, so we are exceeding the limits. We ask for increases, but the process is moving too slowly. We did not realize this was the case when we selected that other provider!

If we move this to linode, are there any such limitations with # of emails sent? We need 100,000-300,000 / day at times.

There is no particular limitation: Linode does not provide a smarthost/mail relay service, so e-mail is entirely between your mail server and the recipient's mail server.

If possible, it would be a good idea to slowly ramp up the amount of e-mail traffic leaving your Linode's IP. This isn't due to Linode policy, but rather because receiving mail servers tend to "distrust" new IP addresses, particularly ones that suddenly start issuing a lot of e-mail. It usually works itself out automatically over a few days/weeks (except for Hotmail, of course), but that's a lot of mail landing in a lot of Spam folders until then...

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