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Jeff Harlow's avatar
Jeff Harlow
Iron Contributor
Feb 23, 2018

Send Mail (SMTP) through Office 365 with MFA

We have a web server that needs to be able to send emails as users (FROM field); however, we have noticed that if the user account is protected with MFA, the message is rejected.  Has anyone been abl...
Authentication
exchange
office 365
security
Rnishat0786's avatar
Rnishat0786
Iron Contributor
Aug 14, 2019

Jeff Harlow 

Kazu1301 

 

You can still use Option one .. all what you have to do is generate an app password to by pass MFA.

 

Follow the steps in the below article ..

 

https://support.office.com/en-us/article/create-an-app-password-for-office-365-3e7c860f-bda4-4441-a618-b53953ee1183

 

Thanks

 

Robin Nishad

  • Kazu1301's avatar
    Kazu1301
    Copper Contributor
    Aug 14, 2019

    Hi Rnishat0786, it was the first thing I tried. In the same way I do with Outlook, I generated the app password and tried it with no success. I am creating a SecureString file (encrypted pwd file) and generating a PSCredential Object from it for authentication using Powershell, as follows (I hope the variables are self explanatory):  

     

    $SecureStringPassword = Get-Content -Path $EncryptedPasswordFile | ConvertTo-SecureString

    $EmailCredential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $SMTPUsername,$SecureStringPassword

    ....

    Send-MailMessage -From $MailFrom -To $MailTo -Subject $MailSubject -Body $MailBody -Port $SMTPPort -Credential $EmailCredential -Attachments $Attachment

     

    This approach works very well without 2FA, but not with app password. Do you see any mistake here or any changes that may work?

     

    Regards

     

    Kazu

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