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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...
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
SPF is set correct
"v=spf1 include:spf.protection.outlook.com -all"
As I can see ;)
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.