Forum Discussion

Copper Contributor

Dec 08, 2017

Solved

External software sends email and is marked as outgoing SPAM

Hey everybody! We use an external software to send emails. All these emails get marked as outgoing SPAM. How can I avoid this? We use SMTP Sending with TLS activated. And it only happen...

office 365

NunoAriasSilva
Dec 08, 2017
Hi,

Please use the Option 1 (recommended) on the article that have previous described to avoid SPAM https://support.office.com/en-gb/article/How-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4

EDIT Support

Brass Contributor

Dec 08, 2017

It shouldn't make any difference if you have configured an application to send using SMTP client submission (recommended option here - https://support.office.com/en-gb/article/How-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4)

Inspect the header of an email marked as SPAM, that might give you an idea. I assume you have SPF records configured correctly.

Harald Bacik

Copper Contributor

Dec 08, 2017

SPF is set correct

"v=spf1 include:spf.protection.outlook.com -all"

As I can see ;)

Crimson Castellon
Copper Contributor
Dec 08, 2017
Are you using SMTP client submission or SMTP Relay with IP-based connector? If it's the latter, may need to update your SPF with your 3rd party's public IP address.