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I am working on an email filter and I have come across a list of regular expressions that are used to block all emails coming from senders that match a record in that list. While browsing through the list, I have discovered that all occurrences of the @ character are escaped with a \.
Does the @ mean anything special in regular expressions and needs to be escaped like so \@?
It’s normally not a special character, but it doesn’t hurt to escape it which is probably why many people do it, they just want to be safe (or they think it’s a special character).