Recent Posts

Unsubscribe vs Suppress

• steve
• Best practices

When someone sends a complaint to your compliance desk there are a range of things you want to do, but one thing you always want to do is ensure that the recipient doesn’t receive any more unwanted email from your customer. Or, at least, not from your network.

How to Unsubscribe

• steve
• Technical

Eventually our subscribers won’t want our email in their inbox any more.

The Case of the 500-mile Email

• steve
• Technical

I stumbled across this story again this morning, and it’s such a lovely delivery yarn I thought I’d share it.

iOS17 filtering click tracking links

• steve
• Technical

I’ve heard quite a bit of concern about what iOS 17’s automatic removal of click-tracking parameters means, but less discussion of what it actually does.

They Must Have Changed Something…

• laura
• Delivery improvement , Industry

One of the most common refrains I hear from folks with delivery problems is that the filters must have changed because their mail suddenly started to go to the bulk folder. A few years ago, I posted about how even when there is no change in the sender’s behavior, reputation can slowly erode until mail suddenly goes to the Gmail bulk folder. Much of that still applies – although the comments on pixel loads (what other folks call ‘open rates’) are a bit outdated due to changes in Gmail behavior.

Is this email address disposable?

• steve
• Industry

As a consumer there are several different sorts of email address that are described as “disposable” or “temporary”.

C is for Cookie

• steve
• Industry , Technical

What is a Cookie?

I’m not talking about biscuits, nor about web cookies, at least not exactly.

Unresolvable RFC.5321 domain at Yahoo

• steve
• Delivery improvement , Technical

Seen this recently?

451 Message temporarily deferred due to unresolvable RFC.5321 from domain; see https://postmaster.yahooinc.com/error-codes

Is .edu a canary?

• steve
• Technical

Several times recently I’ve heard about something unusual happening email delivery-wise at academic domains that was new, and wasn’t being seen at non-academic domains on the same lists.

Want a link on WttW?

• laura
• Best practices

There is an ever increasing amount of spam I am getting from various companies asking for links here on WttW.