On Sun, Apr 03, 2016 at 12:41:58PM +0200, Lars Nielsen wrote: > Hi, > This Thursday i had problems sending mails to outlook.com addresses. > I found out that MS thought my mail-server was suspicious and had > blocked me as sender. I could however mail to them and gotten my > server allowed again. > > But how can i ensure that i run a "professional" mail server that > doesn't get blocked? I have attached my "postconf -n" output here so > you can see if i miss something obvious!?
>From what I've noticed online, the biggest factor in whether your mail gets >delivered to these big e-mail providers is your IP address. If you're >self-hosting from your cable provider's DHCP pool, expect some of your mail to >not be delivered. Unfortunately, big e-mail providers like Yahoo, Comcast, >AOL, Microsoft, etc. can afford to throw their weight around and make you and >I conform to their standards. If your server's on a network that is intended >for servers, then the next thing that seems to matter is a reverse DNS record. >Make sure your network provider has assigned you one and that it matches your >hostname. I've also had good luck using this free tool called Mail Tester: https://www.mail-tester.com/ It'll check the content of your mail and give it a score depending on how likely it is for the mail to be delivered to an inbox. -Mike
