Deliverability AMA: your BFCM success starts in the Inbox

Forum|Forum|9 months ago
July 17, 2025
26 replies
1589 views

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chloe.strange
Community Manager

Welcome to our Deliverability AMA!

Struggling to hit the inbox? Wondering why your open rates have dipped, or what a spam trap even is? You’re in the right place.

From July 21–28, 2 of our deliverability experts, @Shareen and @Hugues, are here to answer all your questions, big or small. Whether you’re troubleshooting a drop in engagement or trying to decode sender reputation, we’re ready to help.

Drop your questions in this thread any time during the AMA window, and we’ll respond by Monday, July 28.

Let’s get your emails where they belong: the inbox.

Ask away! 👇

This AMA is now closed - feel free to ask any questions to the general Community by clicking on the “New Post” button in the upper right corner.

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Shareen
Klaviyo Employee
Forum|Forum|9 months ago
August 1, 2025

Hi,

Lately we’ve noticed a lot of our emails are going to spam - especially outlook. When we send it via another inbox, like our customer service mailbox for example, we noticed a significant increase in responses. (This specific example is from an event newsletter). Is there anything we can do to stopped being flagged as spam ? We did not had this issue before, and only noticed it around April this year.

Hello @ren_lipari thanks for reaching out, this is a common issue, especially with Outlook, which can be particularly strict when it comes to filtering. If your emails suddenly started landing in spam around April, that suggests a reputation or authentication change.

Here are a few things to check and actions you can take to improve inbox placement:

Check Domain Authentication (SPF, DKIM, DMARC)
Avoid image only emails or overly designed emails
Review engagement segments
Compare sending behaviour
Check for reputation or volume changes around April

I’d also suggest starting a warming period dedicated to these mailboxes, targeting your most engaged Outlook users and monitoring the results.

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