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[Solved] Temporarily closed signups because of spam signups (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by ruud@lemmy.world to c/lemmyworld@lemmy.world

57 comments fedilink hide all child comments

So some spam signups just happened (all username12345678@gmail.com format e-mail) This caused bounced mail to increase, causing Mailgun to block our domain to prevent it getting blacklisted.

So:

Mail temporarily doesn't work
I closed signups for now
I will ban the spam accounts
I will check how to prevent (maybe approval required again?)

Stay tuned.

Edit: so apparently there is a captcha option which I now enabled. Let's see if this prevents spam. Registrations open again.

Edit2 : Hmm Mailgun isn't that fast in unblocking the domain. Closing signups again because validation mails aren't sent

Edit 3: I convinced Mailgun to lift the block. Signups open again.

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[–] lwuy9v5@lemmy.world 0 points 1 year ago (1 children)

fwiw - there's always an arms race between spammers and people trying to not get spammed. It's often better to use off-the-shelf captcha's or something as there are people who are able to put a LOT MORE resources into it (like Google, who has billions of dollars on the line to prevent ad-fraud and identify bots)

[–] fsk@lemmy.world 1 points 1 year ago

I used a custom captcha for my personal WordPress blog. It eliminated all the spam. (Fun fact: The spammers know how to work around most anti-spam WordPress plugins. If you roll your own, they aren't going to update their spambot for one blog.)

I also used a custom captcha at work. We couldn't use 3rd party filters because it was marking our customers' comments as spam! The custom captcha also eliminated all the spam.

There's also a problem with using 3rd party spam services. You have to give them all your data. You also usually have to pay for it, which can be a problem when you're working for people with a tiny budget.