My Emails are landing in clients SPAM or JUNK folder

Question

My Emails are landing in clients SPAM or JUNK folder

Ryan Paul 0

Hi Team,

We migrated from Hostinger to MS Office 4 months ago, I hardly send 20 emails per day, when I check with my clients if they have received my email, they say NO, when they check again email if landed in SPAM or JUNK folder which is affecting my business.

Please suggest.

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Answer 1

Jayden-P 26,265 Microsoft External Staff Moderator

Hi @Ryan Paul

If your emails are consistently being delivered to recipients' Spam or Junk folders, the issue is often related to email authentication, domain reputation, or sending practices rather than the number of emails you send per day.

Since you migrated from Hostinger to Microsoft 365 about 4 months ago, please check the following:

Verify that your DNS records are correctly configured, especially SPF, DKIM, and DMARC. Missing or incorrect records can cause receiving mail systems to classify your messages as spam.

Check your domain reputation using public mail reputation tools and confirm whether your domain or IP has been flagged by any email filtering services.

Review the content of your emails. Excessive links, attachments, marketing-style wording, or bulk emailing patterns can increase the likelihood of spam filtering.

To help narrow down the cause, could you please confirm:

Is this affecting all recipients or only some recipients?
Do the affected recipients use Outlook.com, Live.com, or another email provider?
Have SPF, DKIM, and DMARC been configured for your domain since the migration to Microsoft 365? https://learn.microsoft.com/en-us/defender-office-365/email-authentication-about

I look forward for your reply.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Ryan Paul 0 Reputation points

2026-07-30T13:00:56.81+00:00

SPF, DKIM, and DMARC is already fixed, issue is with the clients who use Microsoft 365
Jayden-P 26,265 Reputation points Microsoft External Staff Moderator

2026-07-30T14:29:46.9866667+00:00

Hi,

Thank you for the update. Since SPF, DKIM, and DMARC are already configured correctly, and the issue could be from recipient side. The problem may be related to how the recipient organizations' email filtering systems are evaluating messages from your domain.

To help narrow this down, could you please confirm:

Is this affecting all Microsoft 365 recipients or only certain organizations?

As a temporary workaround, please ask affected recipients to mark your messages as "Not Junk" and add your email address or domain to their Safe Senders list.

If the issue is affecting multiple users within the same Microsoft 365 organization, their IT administrator may need to review their mail filtering policies and determine whether any allowlisting is appropriate for your domain.