SOLVED

Outlook 365 SMTP Server

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New Contributor

Hi All,

I switched from GoDaddy "cpanel email" to Outlook 365 email yesterday.  I am trying to get a small piece of booking software to send appointment reminders, but it needs an SMTP server to do this.  I've tried entering the information in the screenshot, but I am getting the following error:

 

Error: The server rejected the sender address. The server response was: 530 5.7.57 SMTP Client was not authenticated to send anonymous mail during MAIL FROM [DM5PR2201CA0012.namprd22.prod.outlook.com]"

 

I hope I have a setting incorrect.  Can anyone offer any help?

 

Thank you in advance.

8 Replies
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SMTP client sunnidominerade only support TLS..make sure your software supports this..Also is your software behind a firewall? If so make sure to open 587 in it! If Tls is not available you can do this with smtp relay instead!
Please see Microsoft documentation:

https://support.office.com/en-us/article/how-to-set-up-a-multifunction-device-or-application-to-send...

Adam
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Sorry! It was suppose to say: Smtp client submission :)
My swedish keyboard don’t behave sometimes!!
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Is the user account licensed for Exchange Online?

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Yes of course! Make sure the User is licensed
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hi guys, thank you for the responses.

I'm trying to determine if the software supports "TLS" right now. What do you mean by "account licensed for Exchange Online". I assumed it was because it was setup for/under Outlook 365. How can I check?

Thank you.
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The user/account must be licensed to send mail. This is easiest checked in the admin portal in office 365 -> users -> select the user you use for smtp and check under licenses
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I am able to send emails from this address and it appears some type of licensing has been granted.

 

"Exchange Online (Plan 1)"

 

Hopefully I will here back soon from the company that authored the software with respect to the TLS.

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Solution

Hi Guys,

 

I've changed direction and setup my appointment reminders using my local ISP.  5 minutes, done.  I can't believe how much more complicated simple tasks have become with "advancements" like Outlook 365.

 

In any case, I appreciate your input,

 

Thank you.