How to legitimately work around ISP rate limits

Posted by Derek Ting on Server Fault See other posts from Server Fault or by Derek Ting
Published on 2010-02-19T03:45:19Z Indexed on 2012/11/09 5:06 UTC
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A lot of ISP rate limit the amount of e-mails that is sent from a particular IP address. What is the proper way to get around that rate limit?

Our company has an iPhone application that sends many e-mails because of our large user base and many e-mails go to different ISPs that rate limit the number of messages coming from a specific IP.

We do not send spam and we are a legitimate business. However, is there a better way to resolve this limitation rather than just getting a ton of IP addresses?

Ideally, I wouldn't want to rely on a third party service to send mail. However, if its the only possible solution, we would consider.

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