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A few customers are allowed to send huge mailings to their customers. I have learned, that the Abuse Detection will avoid this. I use the settings, which Bruce has recommended in his great document. The DoS setting for SMTP will block a mass mailing. Therefore i had whitelisted the IP address for SMTP of the senders. I'm not a fan of whitelisting at all, but it's needed for this case.
btw, does a Trusted Sender overrule the Abuse Detection?
Now i have customers having an IP address which changes on a daily base, which is a nightmare for the whitelisting.
I'm looking for an idea, how to allow mass mailing without going nuts by whitelisting an IP address every day.
How do you deal with mass mailings?