r/exchangeserver • u/ahmsafran • 3d ago

Question Group mailing issue

New m365 & created new distributed group. Group can receive mail within organization but not outside. Any leads pls
Thx

0 Upvotes

50% Upvoted

6 comments sorted by

3

u/Blade4804 Lead Infrastructure Engineer 3d ago

By default external sender are disabled. You need to change the primary domain on the email address that belongs to your org, not onmicrosoft.com, then in the delivery management enable external senders. Takes about 10 minutes to sync

2

u/CaptainLykke_ 3d ago

Exchange Admin Center > Recipients > Groups Find your distribution group and go to settings > delivery something > select senders inside and outside my company

By default distribution groups will block messages from ourside

1

u/ahmsafran 3d ago

Already enabled while creating group🤗

1

u/Texkonc 2d ago

Did you create the MX records?

2

u/TheTr3mblay 2d ago

Set group AD attribute msExchRequireAuthToSendTo to false.

Let it sync of you are hybrid and you should be good.

1

u/7amitsingh7 2d ago

Most likely, external senders are blocked by default. In Exchange Admin Center, go to Recipients → Groups → select the group → Delivery Management and allow senders inside and outside the organization. Then test again.