"Error 451" when registering with certain types of e-mails.

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sirocyl
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Joined: Sun Jul 19, 2015 12:44 am

"Error 451" when registering with certain types of e-mails.

Postby sirocyl » Sun Jul 19, 2015 12:55 am

It was cryptic to me, and I couldn't puzzle why it was blocking me until I looked through the spambot banlist on a forum I run.
All those e-mails are like w.hat.ar.e.yo.u.do.in.g@gmail - which makes it easier for spammers to recycle the same e-mail for several spam targets after one gets blacklisted.
It was simple. My e-mail has too many dots!
My usual e-mail is of the format x.xx.xxx.xxxxxx@gmail.com, but every time I registered, it spat me to a cryptic "Error 451: Unavailable for legal reasons" server error.
I thought I was going crazy, everyone else seemed to be fine with signing up, and nobody else had the same symptom.
After a bunch of diagnostic work I managed to sign up by getting rid of the dots.
Thought I'd bring up notice to it, in case anyone else had the same problem. ;)

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Dr. Merio
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Re: "Error 451" when registering with certain types of e-mails.

Postby Dr. Merio » Sun Jul 19, 2015 1:02 am

I'm curious. I'd also like to know why it throws a 451 error, considering that this one is used for sites unavailable for legal reasons.

If anyone knows about this, please post about it!
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sirocyl
Posts: 80
Joined: Sun Jul 19, 2015 12:44 am

Re: "Error 451" when registering with certain types of e-mails.

Postby sirocyl » Sun Jul 19, 2015 1:08 am

It's probably a deterrent to spambots attempting to robo-register on the site.
I personally use 451 for a few scenarios:
- to indicate DMCA or other legal takedowns
- to deter IP blocks or certain countries with less-than-stellar spam/abuse policies
- to keep from "doing business" with a nation that is under embargo to the US.
It's not unusual to deter spammers, but it bugged the hell out of me, made me double- and triple-check my computer and all the computers on my network for malware, in case I got hit on an IP abuse blacklist or something.

I don't think vanilla PHPBB has this behavior, but I could spin up a test instance.

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Dr. Merio
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Re: "Error 451" when registering with certain types of e-mails.

Postby Dr. Merio » Sun Jul 19, 2015 1:14 am

Thanks for this information. Also I tried registering on my local phpBB copy with a similar address to the one you described, but no errors come up, which makes me think it's something specific to this site too.
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