All posts in the topic Blocking Disposable Email Addresses

I have made a small attempt to block disposable email addresses. Committed (but
not deployed on OnlineGroups.Net, as it is Friday) is code to check a new email
address, to ensure that it does not come from a “disposable email-address
provider”. Such temporary addresses are created and disposed of automatically,
so spammers cannot track you.

Unfortunately, disposable addresses mean that *we* cannot track you; that is a
Bad Thing™. OnlineGroups.Net was hit by someone using a disposable address to
gain posting-privileges to our site, and using that privilege to send out spam.

In the future I will implement a challenge-response system, where GroupServer
randomly marks an address as unverified an requires the user to reverify. This
is the same future where I have a flying car — and a group that encrypts all
messages, and requires all messages to be encrypted.