[tadzik_]

Hell, booking.com will even tell you that "your address looks incorrect" (sometimes, I got it once out of two bookings made on a single day), if you dare to use your own domain .com. They used to nag me about "ohh, are you sure it's not [e-mail]"? And I'm not sure what's worse.

[fennecfoxen]

You got nothing on my [e-mail] email.

Can't register at half the sites, and if you can register sometimes you can't log in. Banana Republic, in particular, lets me log in through one login flow, but not the one that's integrated into the checkout process.

[Ductapemaster]

Ah! What a coincidence — I registered my Banana Republic account with a gmail "+" email (eg, [e-mail]) as is my standard practice with retail accounts, and I have the same login issues. It's quite odd, but I'm glad it's not just me!

[davchana]

Wallethub let me register [e-mail] but did not allow + sign in login. Cant signup again with [e-mail] Had to ask support to fix that.

[hc-taway]

If they’re just warning but letting you proceed, that’s fine. They do that because they see looooots of people screwing up their own email addresses in a few common ways. Run any email signup with a general audience and any kind of volume and you’ll end up doing the same, to reduce the load on support.

[tyingq]

It does work well. I used a customized version of https://github.com/mailcheck/mailcheck on an ecomm website and the amount of bounces due to typos went way down.

It is important to tune it a bit based on what you see after installing it to reduce the amount of bad suggestions.

[dkdbejwi383]

Same using [e-mail] or similar. "Do you mean [e-mail]?"

[samanator]

צדיק גמור אתה!