Forum Discussion
Can't send SMTP mail after setting Default Security in Office 365
LusoAdmin Hey there. I'll put the solution here because as far as I can tell, everyone should also have that problem now. It took 1 week with the Microsoft support to finally find the solution. Just like I thought, because now the default security is enabled when you create a new tenant, even if you disable it, smtp somehow stays disabled and that overrides the settings in your admin panel.
All you have to do is enable it in Powershell. To connect with Powershell, first you have to execute this:
Connect-MsolService
Import-Module ExchangeOnlineManagement
Connect-ExchangeOnlineThen you enter your admin credentials. After that, you can check the "smtp disabled" flag, it should be set to "true":
Get-TransportConfig | Format-List SmtpClientAuthenticationDisabled
To enable smtp and get things working again, you enter this command:
Set-TransportConfig -SmtpClientAuthenticationDisabled $false
Worked for all my tenants. I hope this helps you too!
Nah, i'm more the 'let's see what this button does' type of guy 🙂
MS is expert in producing large quantity's of text with very little info. Especially if English is not your native language it's sometimes very difficult to follow.
Do you think there is a way to **bleep** a little hole in the default security , just to allow one mailaccount to send mail via SMTP ?
That depends on what licensing you have. Security defaults on their own don't allow much customizability, it's a plain on/off switch for all features as a single package. But if you have AAD Premium licenses, you can create a policy that matches the Security defaults restrictions, with few added exceptions as needed.