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Why did my open rates drop after I changed my sender address?

Sep 17, 2026 2:54 PM UTC
5 replies
376 views

TL;DR: When you change your "from" address, it must align with your branded sending domain to stay DMARC-compliant. Misalignment is the most common culprit for post-change deliverability drops.

Full Q&A:

Hello,the domain warm-up has been completed, but after changing the sender, the open rate is very low. What should I do?

Hello @partfool :)
Make sure that your new sender address aligns correctly with your sending domain.
This requirement is part of the 2024 Gmail/Yahoo guidelines.

In order to be DMARC compliant, the domain in your friendly “from” address must align with the root domain in your branded sending domain.

So, if your branded sending domain is send.kvyodc.com, the root domain would be kvyodc.com. Therefore, using hello@kvyodc.com as your “from” address would align with the root domain.

Be sure to double-check all friendly “from” addresses for alignment in your flow emails and campaigns.

Deliverability & delivery

P

partfool

Contributor I

Hello,the domain warm-up has been completed, but after changing the sender, the open rate is very low. What should I do?

J

Jason Miller234

Active Contributor I

This usually happens after changing the “From” address because deliverability resets.

Make sure your new sender domain is DMARC-aligned with your branded sending domain (SPF + DKIM passing). If alignment is off, Gmail/Yahoo will lower trust and your opens will drop.

Once fixed, re-warm the new sender gradually and performance should recover.

W

william111ttt23

Problem Solver I

nice

alikhan

Contributor II

great

J

JohnPaul

Contributor I

A sender address change can definitely affect deliverability and open rates. Checking domain alignment, DMARC settings, and sender reputation is a good starting point when troubleshooting a sudden drop.

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