ThotCon 0x7

ThotCon, or “Three One Two” Conference (Chicago’s area code is 312), is one of Chicago’s few hacking conferences. This was my first security conference, and I wasn’t sure what to expect, other than to walk away more educated and (probably) more scared. Success on both counts. I also had a preconceived vision of what the […]

SMTP 5.7.3 Requested action aborted; user not authenticated. [SOLVED!!]

An e-commerce site that I maintain had been working fine, then all of a sudden emails stopped sending. We started seeing this error: Mailbox unavailable. The server response was: 5.7.3 Requested action aborted; user not authenticated   We hadn’t changed any code, and our username/password worked fine on the web. It turns out that our […]