Using SMTP Relay with Exchange Online

Ola Amigos

Uma dica para quem esta usando o serviços de Cloud Computing da Microsoft – Microsoft Online Service “BPOS” Exchange Online e necessita que sua aplicação interna envie e-mails usando o SMTP do Exchange Online.


With the deployment of the August Service Update complete, SMTP clients can connect to Exchange Online SMTP servers and authenticate using Microsoft Online Services user credentials to send mail. The connection requires Transport Layer Security (TLS).

SMTP Relay capability allows organizations to use Exchange Online as an SMTP service for mail originating outside of the Exchange Online environment, for example SMTP-enabled applications such as fax servers.

To connect to the Microsoft Online Services SMTP server, open the SMTP client application and provide the following information:

· The fully qualified domain name (FQDN) of the Microsoft Online Services SMTP server. The FQDN will be slightly different depending on which Microsoft Online Services Data Center your organization is connected to. The server FQDNs are:

o North America Data Center:

o Europe Data Center:

o Asia Pacific Data Center:

· The user name and password of a Microsoft Online Services user account with an Exchange Online license.

o On most client applications, this is under “My outgoing mail server (SMTP) requires authentication” – this should be configured “Yes”, and the corresponding Microsoft Online username and password supplied.

· The SMTP port to use: 587.

o On most client applications, this is under “Server Port Numbers for Outgoing Server (SMTP)” – this should be configured to use port 587

· Make sure that Transport Layer Security (TLS) is enabled in your SMTP client.

o On most client applications, this is under “My outgoing mail server (SMTP) requires an encrypted connection (SSL)” – this should be configured “Yes”

NOTE: The FROM address must use a SMTP domain of type “Authoritative” – this can be confirmed in Microsoft Online Administration Center, under the Users – Domains tab.

Important: Remember to update the user Microsoft Online Services Account password regularly, before the password expires, or your SMTP-enable application will be unable to connect and send email. Microsoft Online Services passwords expire every 90 days.


Send and Receive POP E-Mail with Exchange Online 

Please see our new blog post – Enable POP3 in Microsoft Exchange Online Mailboxes


Exchange Online now supports POP e-mail, so you can send and receive Exchange Online e-mail using any POP e-mail client. For information about other recently announced features, see Service Update: October 2009 Release Availability, Features Announced.

NOTE: POP e-mail does not provide Free/Busy, presence, calendar, tasks, and other rich features normally associated with Exchange Online e-mail. Additionally, POP e-mail access cannot be enabled for Deskless Worker accounts.


· If you are a Microsoft Online Services administrator, you can contact Microsoft Online Services Technical Support to request POP service, and provide them with the list of e-mail addresses to POP enable. You can specify a list of individual mailboxes or every mailbox in your organization. You can track the status of your service request on the Support tab of the Microsoft Online Services Administration Center.

· Any POP e-mail client.

· Microsoft Online Services user account with a Standard (not Deskless) Exchange Online license.

· Port 995 in through your company’s firewall.


When Support notifies you that POP e-mail has been enabled, follow your POP e-mail client instructions to configure your e-mail client. You’ll need to provide the following information:

· Port number: 995

· Security protocol: SSL

· User account: For example,

· User account password

· POP Server: select from POP Servers by Location table below.

NOTE: If you want Exchange Online to keep a backup of your e-mail, select the configuration option that allows you to keep your e-mail messages on the server.

POP Servers by Location

Asia Pacific (APAC)

Europe, the Middle East, and Africa (EMEA)

North America

Exchange Online, SMTP, Administration Center, E-mail, POP3, Technical Help, Service Administrator Help, Business Productivity Online Suite


Sobre Julio Vaz

15 years’ experience as an IT infrastructure consultant and Solution Architect. Accomplished IT professional recognized for excellence in the design, management, and development of complex business applications. Passion for delivering software and technology that meets the needs of the business. Proven ability to work with business users together with a strong development background make for an ideal analyst or solutions architect. I'm a results-driven IT professional on consulting for integration projects with extensive experience in the engineering, administration and support. Direct experience with customer relationships, complex problem troubleshooting, implementation, optimization, technology advisor and training deliveries. Always interested in professional growth as well as high-quality service delivery. Playing the role of solution architect and project leader focusing on migrations and deployments of Office 365 (Exchange Online, Sharepoint Online and Skype for Business) and Microsoft Azure (IaaS, PaaS, SaaS DRaaS). My main responsibilities were:-design and architecture scaling Exchange Server 2003 migration, 2007, 2010 and 2013 to Office 365 with ADFS in Microsoft Azure as IaaS; -Management of major project of Yammer and Sharepoint; -Development of strong relationship with partners and major customers.
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