In general, anything over 2% is great, I'd say.
Anything under 0.5%, go and check what you're doing...
(it really depends on your offer, the info, price, what you say, etc. what kind of response your getting. Language is very important, changing ONE word can improve the results or mess them up completely by a double-digit share. No one could tell you what to expect, it's a trial-and-error thing.)
https://zapier.com/blog/customer-sup...uage-and-tone/
Have a look here. The link will redirect you to the article.
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Let's say you spend $1000 on a campaign, you sell $15,000 worth of stuff as a result from the campaign (you can track via vouchers or click-through on the email) with a profit margin of 40%, you'll make $6000 profit, minus $1000 for advertising leaves you with $5000 in pocket. You're "in the money".
Now, if your response rate was 2.5% and your conversions 0.8% , for the campaign to fail or cost you money, your response rate / conversions needs to drop below 0.5% or 0.16% respectively. (that's a very rough formula, without factoring in the cost of the campaign accurately, you'll work out your formula).
Hope that helps.
:-D
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