Re: Not just the users though
Had a similar problem at work. My company's bank started to complain that they could not send e-mails to us. After much back-and-forth of e-mails we finally worked out that their IT bunch had decided to configure their e-mails so that they would only send using TLS, which we had not configured our e-mail system for (my bad, I could not be bothered to do it). Of course the banks IT crowd did not announce this, and when we started asking questions along the lines of "have you changed anything, and if so what" they refused to talk to us.
Biting the hand that feeds IT
