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Our app sends plain text emails. They appear fine in some email clients but the ASCII/text table lines are distorted in Outlook 2010. How can you force Outlook to view these as plain text without any formatting?
Figured it out. Have to change your plain text font to a monospaced font such as Courier New.
More info here.
File > Options > Trust Center > Trust Center Settings > Email Security > Read all Standard Mail in Plain Text
Required, but never shown