An ex-colleague was speaking to a customer about creating rules to look for bad words. In his description, he bashed out a rudimentary regex designed to look for the word "tits". He made it clear that he hadn't actually put much thought into it and the client shouldn't use his example as it could cause some loops. The client copied it verbatim, put it into production and crashed their mail server. So the client's entire email platform fell over because it was too busy looking for tits.
An ex-colleague was speaking to a customer about creating rules to look for bad words. In his description, he bashed out a rudimentary regex designed to look for the word "tits". He made it clear that he hadn't actually put much thought into it and the client shouldn't use his example as it could cause some loops. The client copied it verbatim, put it into production and crashed their mail server. So the client's entire email platform fell over because it was too busy looking for tits.