Seek and Destroy Invalid Addresses to Avoid Temporary Blocking

Author:

Stefan Pollard

Source:

Even email marketers who practice regular list hygiene can find themselves unable to mail to a specific ISP because a campaign generated a temporary block at an ISP. The bounce code reporting the block usually says the sender generated "too many invalid email addresses."
 
This occurs more regularly because many marketers are trying risky acquisition tactics to grow email lists quickly. Quality still outweighs quantity in the long run. Legitimate marketers should understand the trade-offs.
 
If you engage in poor list-building techniques, you might lose the privilege to market to all your subscribers, not just the ones you added quickly.
 
A temporary block due to invalid email addresses isn't as serious as a permanent block, because it usually lasts 24 to 72 hours and doesn't require you to...