Forum Discussion
Firebase authentication emails are blocked by Office 365
Hi arnotixe,
Thanks for sending me a test message.
It was Quarantined by O365 as High Spam/Phish.
The problems that I see here are 2 main ones. On one hand the links are considered dangerous, ( but that probably can be easily solved fixing the other problem.
On the other hand, your sending server is blacklisted: mail-vs1-f70.google.com (209.85.217.70)
So, basically you need to ensure to delist it or use another relay for such deliveries. DKIM passes, but the sender server has low reputation.
- Wondering who to contact next, as the server itself is probably sending out on behalf of many different identities.
This problem is currently affecting 74 of my business customers.
The way it looks now, setting up a different outbound server for these mails (serving only my domain for example) would be the only option?Hi arnotixe,
Not sure if I got your question. But you have many options...
- Ask the provider to delist.
- Use another relay
- Request the recipients IT teams to whitelist you, ( probably rejected by the Security teams. Think that they have no control over the sender servers... You neither. Too risky ).
And probably other options depending on your environment and requirements.
The point is basically that O365 identifies your messages as SPAM/Phish and is quarantining all your messages.
- yeah this is still a problem (exclusively for Microsoft customers) even after having purchased a Dedicated IP to send with…
