Emails sent reported via SES dont match Mautic Email Count

Your software
My Mautic version is: 5
My PHP version is: 8.1
My Database type and version is: MYSQL5.*

Your problem
My problem is:

I created a campaign with 32k verified emails. Mautic reports 32k emails sent, but SES only reports around 6k.

These errors are showing in the log:
app.ERROR: CAMPAIGN: HTTP 400 returned for “”. Code: InvalidParameterValue Message: One or more parameters are invalid. Reason: Message must be shorter than 262144 bytes. Type: Sender Detail:

Steps I have tried to fix the problem:

Hello @alvaroenoht

First of all, let me tell you that the problem you’re bringing up is not because of Mautic. After doing a little research, and as the error message indicates, you are attempting to add some attachments that are very heavy, and Amazon doesn’t allow it because it exceeds the 2GB limit.

If your email contains a lot of images, you should compress them.

Check if this helps you out:

Best regards,

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