I’ve run a fair amount of email campaigns where we strip out the + if gmail is the domain to ensure it doesn’t end up in some weird filter.

Dick move, I know. Tell marketing that though.

I personally use gmail through a vanity domain and have a catch all rule, so I end up signing up with a fake email account for every domain (hn@mydomain.com) and then the catch all forwards it to my real account (me@mydomain.com).

> I’ve run a fair amount of email campaigns where we strip out the + if gmail is the domain to ensure it doesn’t end up in some weird filter.

At which point you should wind up in the "how widely can I advertise that you're a spammer and all your outbound email should all be routed straight to /dev/null for sending mail to an email address you were never given" filter.

I think that marking the mail as spam sends a signal to their email provider, putting a mark on their account?

Depends on your isp and which email provider they use. The big marketing email services generally do have the feedback loop setup with Gmail though, so yes, you are right.

> I’ve run a fair amount of email campaigns where we strip out the + if gmail is the domain to ensure it doesn’t end up in some weird filter.

Which works, until the Gmail users who bother using + addresses with filters start giving all legitimate senders + addresses and sending everything thst doesn't have one and doesn't come from Google straight to deletion (possibly with a stop by “mark as spam” en route.)

The problem is not all legitimate sites/sources will actually accept '+' as a valid email character even though the RFC says it's a valid email character.

Jinx. :D

Yeah problem with that is the number of crappy regexps sites use that stop you from signing up with a + address in the first place.

Sounds like a great way to get your email marked as spam.

I wonder if it could be argued that this violates anti-spam regulations. Depends on how “plus” addresses get interpreted. Are they a different recipient?

This is pretty useless.

First because it leaks the underlying email (you can safely assume all spammers are well aware of this feature).

Second because if you start receiving spam, you can't stop it. All you can do is to try to deal with the firehose.

A much better solution is randomly generated aliases that you can delete.

It really baffles me that people are still suggesting this as advice for spam reduction. All it takes is a third of a brain and a couple seconds of thought to realize that spammers know this is a thing and can adapt.

They can, but in practice, they don't.

> They can, but in practice, they don't.

And you're confident of this how? I'm not actually convinced this is true. It's definitely a widespread belief though.

Because I'm using the + thing, and I'm still receiving spam to the +ed addresses.

Weird, I've done that for a long time too and hardly any received spam to those at all. Good to know though, thanks.

Independent of the concept's wisdom or implementation, Yahoo! introduced disposable addresses (originally marketed as 'Address Guard') back in 2003: http://web.archive.org/web/20031023014724/http://biz.yahoo.c...

Spammers will never find a way around this.

Yeah, you do realize spammers know that, too? They will just strip part after the +

Of course I do. But most don't bother, and it still works today.

It also works with foo.bar which is a little harder to filter.

Well, not exactly. That would only work if your address was registered as foobar@gmail.com but not if it was registered as foo@gmail.com. Essentially, periods don't matter in gmail addresses.

Adding a . in between any of the characters (or removing, if you registered the account to have .'s included) will still go to the same email address.

But you can't add .anystring to your address and still receive the message as you can with +anystring.

This always blows the mind of the average gmail user who thinks they registered first.last@gmail.com when they find out that firstlast@gmail.com also works.

And many places block email addresses with pluses in it - for example my insurance company