Forum Discussion
Kais_mbarki
May 31, 2020Brass Contributor
SMTP relay o365 (Send email from application or device to o365 in hybrid mode)
Hello, can i send email to o365 with direct send method in hybrid configuration ? the mail its send to local user in domaine o365 but not send to external user I have an exchange server 2013 h...
- Jun 01, 2020Although I do agree with you Peter on leaving the last Exchange server in place, the option stated by Kais_mbarki should work.
Requirements are creating a connector in EXO from his WAN IP (or option e-mail server of your org in the EXO ECP) to Office 365 and adding a whitelist entry for the IP in EXO as well.
If you then specify your Office 365 "MX record" so your-domain-com.onmicrosoft.com in the app as the mail server with port set to 25 and SSL to ON it should work.
I have several clients who are using Office 365 as a relay server this way.
By the way, I wouldn't suggest using the authentication method anymore because basic auth support will be discontinued in the future.
Jun 01, 2020
Although I do agree with you Peter on leaving the last Exchange server in place, the option stated by Kais_mbarki should work.
Requirements are creating a connector in EXO from his WAN IP (or option e-mail server of your org in the EXO ECP) to Office 365 and adding a whitelist entry for the IP in EXO as well.
If you then specify your Office 365 "MX record" so your-domain-com.onmicrosoft.com in the app as the mail server with port set to 25 and SSL to ON it should work.
I have several clients who are using Office 365 as a relay server this way.
By the way, I wouldn't suggest using the authentication method anymore because basic auth support will be discontinued in the future.
Requirements are creating a connector in EXO from his WAN IP (or option e-mail server of your org in the EXO ECP) to Office 365 and adding a whitelist entry for the IP in EXO as well.
If you then specify your Office 365 "MX record" so your-domain-com.onmicrosoft.com in the app as the mail server with port set to 25 and SSL to ON it should work.
I have several clients who are using Office 365 as a relay server this way.
By the way, I wouldn't suggest using the authentication method anymore because basic auth support will be discontinued in the future.
PeterRising
Jun 01, 2020MVP
I do agree it should work. Have done so many times this way myself. I have found this method can be inconsistent and unreliable at times however. But yes, it does work.