Email error

[Tiffany_Gray]

Hi,

I have updated one of our client contact email address - twobob@zoho.com to receive communication. However, when i look a the activities log it gives the attached error. I have communicated to this client via this email on Outlook so it's an active address. Can you please confirm why this might be occurring?

Thanks,

Tiffany

[SanfordWhiteman]

Please move the question to Products​ (Move link at the right). This isn't a support space.

[SanfordWhiteman]

And include images inline, not as attachments. Not all Community users can see attachments, which makes them very confusing.

[Jay_Jiang]

This is just an answer following reasoning.

The emails that Marketo sends are different to what you send out of Outlook. And I don't mean graphically. The security systems that accept or block incoming email care about what's happened in the backend.

Marketo emails are sent via the Marketo email servers, which has a different IP to the Outlook email you sent. Since Marketo emails are "list" emails they'll have different email headers, and a few other characteristics.

Things to check are:

DKIM and SPF are set up correctly in Marketo

Your Marketo sending IP isn't temporarily blacklisted