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I'm currently trying to setup SMTP Server in MABS using M365 as the relay. I keep receiving error 2013 that the user name or password is incorrect as shown below:
I have seen where they say to make sure all the lines are filled in and they are (sudo email addresses for privacy):
I have tried with both port 587 and port 25. I have even verified using PowerShell's Send-MailMessage that the user account that I want to use to relay mail is able to authenticate and send without any issues. Is there some special configuration or setting that I need to use in order to use M365 as the relay?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 12%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPC%3C/text%3E%3C/svg%3E)
I'm wondering if the issue is to do with the security method as there seems to be no way to force it to use TLS1.2.
You could setup an SMTP relay in IIS - This seems to be what Microsoft recommend and I suspect it is to do with TLS1.2 support.
Basic auth is probably disabled in your tenant
SMTP auth is showing enabled both on the Org level and the User that I'm trying to use for authentication:
Are Security Defaults enabled?
See:
and also check for any authentication policies
Double checked Security Defaults are not enabled in AAD, and we have no Authentication Policies enabled at this time.
Is MFA enabled for that account?
This could indeed be it. If so, create an app password.
MFA is disabled for the account in question.
Have you tried testing the account on a tool such as this: https://www.gmass.co/smtp-test
This would indicate whether there is an issue with the account or the server.
Also, the correct port is 587.
Did you run Send-MailMessage from the same sever you are having issues with? If no, could there be a firewall blocking the connection?
I was able to use an external tool to relay mail using the account in question. As I said I have tried with Port 25/587 for sanity sake just to see if I can get a different result.
Running Send-MailMessage the only issue I have is I have to run it with this line first:
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
I trust that wouldn't be an issue though.
anonymous user-1 not what I was hoping for but the IIS solution did seem to rectify my issue and I'm able to relay my reports/notifications so thank you.