Help centerReceiving a ZeloEmail Delivery Issues

Email Delivery Issues

When sending Zelos it might happen that an email does not reach the recipient, even though it is marked as received in Zelo. Here we explain some of the most common scenarios that might be going on.

All email from Zelo is sent from "". We currently have 0% spam reports, and a good reputation. However, I might happen that a Zelo does not reach the inbox of the recipient it was intended for.

Wrong email address

The most common reason for a failed delivery is an error with the email address. This would show up in the dashboard under "Bounced emails" or "Sendings could not be delivered." Simply update the addresses and send them again, and the problem should be gone.

Commercial, Suspicious, Spam filters...

Even though we have a good email reputation, some email providers might think a Zelo is a commercial advertisement or spam and filter it out before it reaches the recipient's inbox. It would still be marked as received in Zelo since it has been delivered to the recipient's email server.

The Zelo does not reach the recipient at all

Suppose a recipient cannot find a Zelo after checking the inbox, spam filters, etc. In that case, there might be a corporate firewall that filters out incoming emails before it even reaches the recipient.

It would still be marked as delivered in Zelo since it has been delivered to the recipient's email server. Talk with the IT department and see if you can find the reason for the missing delivery.


If you send a lot of Zelos to colleagues who use the same email provider (, the right solution is to ask IT to whitelist the domain "" This way, the deliverability is secure, and emails from Zelo would be marked as safe for spam filters and other email rules.


August 13, 2020


August 13, 2020

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Receiving a Zelo

Simen Ytre-Arne
This article is written by:

Simen Ytre-Arne

Chief Operating Officer

Simen is the Founder and Chief Operating Officer in Zelo, a B2B SaaS that helps managers reach and engage their employees without the burden of silo communication systems.

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