Getting Past the Spam Filters

In the never-ending battle to rid the world's mailboxes of spam, there are far too many victims. One that troubles list managers, naturally, is the frequency with which our mail is delayed, bounced, or dumped. We do everything possible to follow the rules of all ISPs, or at least everything we know about.

For example, all unsubscribe requests are processed before every mailing. If you unsubscribe, you will not get any more issues of QOTD unless the mailing is already underway. If your ISP bounces a message giving "user unknown" (error 5.1.1 or some variant) we immediately discontinue sending to that address. If we see "server unknown" errors, we drop those addresses on Wednesdays so as to not disappoint anyone due to a network problem that arises on a Friday night. It's a lot of work, but we think it's the right way to go.

Still, for some systems we have to be manually added to whitelists for mail to be promptly accepted. If you need to ask your ISP to whitelist your Quotes of the Day messages, here's what they need to know:

SMTP Server: (
Router: (
"From:" address:
"Errors-To:" address:

Although we can't spend an inordinate amount of time with any one ISP (except AOL and Yahoo, of course, given the thousands of messages we send to those systems every day), we are quite willing to provide any information that any ISP needs about our service and processes, even if they only serve one of our subscribers.


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