Removing images in the reply messages is standard behavior for the Mail App on all iOS devices, such as iPhones and iPads.

Supposing that the recipient has already seen the images in the originally sent email, the Mail App removes them in the reply email.

As a signature owner, you might want to prevent this from happening and it can be easily done by changing these Mail app settings:
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​Settings > Mail > Include Attachments with Replies > Always
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Or, following these simple steps:
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​Step 1.
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Go to Settings

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Step 2.
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Click Mail
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​Step 3.
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Set the Include Attachments with Replies setting to Always.

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Congratulations! Now the images in your signature will be showing up in all reply emails sent from the Mail app :)
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Got other questions? Check our Knowledge Base for more articles here or reach out to our Support Team via Live Chat or Email.