I need to migrate, my actual smtp server, to smtp.office365.com I have configured the SMTP at the domain (mydomain.xxx.xxx), and all goes good. Because the email can be sent when I create a test TXT file and drop it into PICK UP folder of the MailRoot.

In the "Outbound SMTP Server" of Central Administration, I enter (mydomain.xxx.xxx) There is no email sent after I set up the alert. I see the error "Cannot connect to SMTP host "mydomain.xxx.xxx" in the Windows Event log.

I also tried to send and email from PowerShell cmdlet, but it fails.

I really appreciate your help.

  • is it 9smtp.office365.com) cloud based exchange server URL?
    – Waqas Sarwar MVP
    Commented Apr 15, 2016 at 14:39
  • @Waqas Sarwaer MCSE I don't know, how could I find that info? Because I received that server from the administrators of my company.. Commented Apr 18, 2016 at 15:21
  • did they give you the URL? check this rosebudtech.com/2013/01/01/…
    – Waqas Sarwar MVP
    Commented Apr 18, 2016 at 15:23
  • I´m afraid that I have not access to login for the URL provided in resebudtech, login.microsoftonline.com, but I can send emails from the TXT file in in C:\inetpub\mailroot\Pickup, do you know why? Commented Apr 18, 2016 at 15:29
  • Sorry, it is not an exchange server. It´s based on the cloud Commented Apr 18, 2016 at 16:41

2 Answers 2


You can configure Your SMTP setting for server from IIS

IIS > select server > SMTP Email

SMTP Email

Enter your SMTP Server name,port and specify credential according your SMTP server

  • I did it. But I´m not sure if it´s correct, to use the same credentials to connect to office365, or I need to use, the credentials to connect to the server. Any case, I try with both. but I still receive False, from the power shell console. Commented Apr 15, 2016 at 13:13

There are couples of things which you should confirm.

  1. install the SMTP server locally according to Office 365 settings
  2. You need SPO licensing for user " To setup your on-premise SharePoint server to use Exchange Online, you need to build SharePoint Online (SPO) accounts for those users and assign the appropriate SPO licenses." https://community.office365.com/en-us/f/158/t/59538

Also check this one https://blogs.technet.microsoft.com/uspartner_ts2team/2014/02/11/replacing-an-exchange-smtp-relay-in-an-office-365-environment/

and this http://rosebudtech.com/2013/01/01/how-to-set-up-an-smtp-relay-in-office-365/

  • The problem persists. I still receive the message from Event Viewer. Cannot connect to SMTP host " ".ID: 6857 IMHO I think that is a problem with my server, but I cannot find the error. I just have a question, why my smtp server works, when a put a TXT file in C:\inetpub\mailroot\Pickup, I received the email. But the connection with sharepoint is the problem. Thanks in advanced Commented Apr 18, 2016 at 14:59

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