Allow a Server to “Relay” Through Microsoft Exchange
KB ID 0000542 Problem Back in the early days of email, just about all mail servers let you relay mail though them. That was fine until someone worked out you could then get someone else to send out your “spam”, and they would look like the guilty party. Even today people misconfigure their Exchange servers and make them an open relay. But what happens if you have a particular server or machine that you want to let use your...
Exchange – Are you an Open Relay?
KB ID 0000087 Problem When Email was a new medium, pretty much all mail servers were open relays, and nobody really cared, after all if someone in Nigeria wanted to relay mail through a college server in Manchester then why shouldn’t they? Sadly with the explosion of Email and internet use this is no longer an option, because all those annoying Emails you get for Viagra or insider stock tips have probably been sent to you...
Exchange 2019, 2016, 2013 – Allowing a Host/IP to Relay Mail
KB ID 0000891 Problem There a a few more hoops to jump through to allow a host to relay though Exchange 2013. For earlier versions of Exchange see the links below. Allow Relay from an IP With Office 365 (Exchange Online) Allow Relay from an IP with Exchange 2010 Allow Relay from an IP with Exchange 2007 Allow Relay from an IP with Exchange 2003 Allow Relay from an IP with Exchange 2000 Solution How to create a ‘Relay’...