Outlook shows edited email in all black, but on an iPhone the edits are appearing in blue?

One of my users edited and sent an email from Outlook 2010. All of the text appeared in black before he sent the message. However, when reviewing it on his iPhone, the edits he made are appearing in Blue.

The email is in HTML format.

Has anyone seen this behavior before? I know there isn't really a robust "track changes" feature within Outlook, but other than suggesting he write all emails in plain text, I'm not sure where to go to resolve this.

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David Johnson, CD, MVPOwnerCommented:
I don't understand your question.
is it something like this using a theme?
ccarter317Author Commented:
Perhaps this will make it more clear. Due to the privacy of the email itself I have taken screen shots only of a portion of the email.

This is the email when viewed within the Outlook client. Note that all of the text appears black/normal.

Portion of email as viewed in Outlook client
This is the exact same email when viewed from the native iOS 8.2 mail client. Note that the portions which were edited prior to it's being sent are appearing in blue.

Email when viewed from the iOS email client.
Jackie ManCommented:
When you edit an email, go to the "Format Text" tab and make sure that you are sending it as Plain Text without any formatting. Details are in the link below.

"Plain text    This is a format that all email applications support. Plain text messages don’t support bold, italic, colored fonts, or other text formatting. It also doesn't support pictures that are displayed within the message body, although you can include the pictures as attachments."


P.S.: The appearance of an incoming mail in mail app of iOS is determined by the sender of the email and the mail app cannot make any change to the appearance.

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