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Ask Laura: Should we confirm unsubscribes?

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Dear Laura,
We have some questions about best practices for unsubscribes. Our ESP uses the List-Unsubscribe header by default on every email. I’m not familiar with this, and I have some questions for you.
First, do you think this is a good idea? Should we always use it, or just for certain emails? Should we use the mailto:link or link to a web site to unsubscribe?
We were also asked about double opt-out and if we should do it. We’re thinking that if someone clicks on the unsubscribe link they would be directed to a site displaying a message such as “Sorry to see you go. We have sent an email out for you to fully unsubscribe from the mailing list”. They then have to open the email and click on the link. Do you recommend doing this? Are there anti-spam regulations that this might violate?
And then, once someone unsubscribes (either with double opt-out or not), should we send out some sort of email confirmation? We currently do not, but we’re thinking of sending something like “Sorry to see you go.  If you unsubscribed accidentally please click here to re-subscribe.” What do you think?
Thanks,
Breaking Up Is Hard to Do

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Spike in Yahoo error codes

A number of people have mentioned over the last couple weeks that they’re seeing a spike in Yahoo rejecting mail with
554    delivery error: dd Requested mail action aborted
Discussions on various mailing lists indicate these messages are related to inactive accounts. Addresses that bounce at Yahoo with these codes should be handled as inactive addresses and removed from future mailings.

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AOL Changes

We’ve known for a while that AOL email infrastructure is going to be merging with Yahoo’s, but apparently it’s happening sooner than anyone expected.
The MXes for aol.com will be migrated to Yahoo infrastructure around February 1st. Reading between the lines I expect that this isn’t a flag day, and much of the rest of the AOL email infrastructure will be in use for a while yet, but primary delivery decisions will be made on Yahoo infrastructure.
The AOL and Yahoo postmaster teams are pretty smart so I assume they’ll have made sure that their reputation data is consistent, and be doing everything else they can do to make the migration as painless as possible. But it’s a major change affecting a lot of email, and I wouldn’t be surprised to see some bumpiness.
If you’ve done anything … unwise … with delivery to AOL addresses, such as hard-wiring MXes for delivery to aol.com, you should probably look at undoing that in the next week or so. I’m guessing the changeover will happen at the DNS level, so if you’ve nailed down delivery IPs for aol.com you might end up trying – and probably failing – to deliver to the old AOL infrastructure.
 

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