Using the SMTP Email palette, if I include a colon in the string wired to the Subject input of 'Set Message Text Html.vi', it shows up as a question mark in the email Subject in the recipient's inbox. For example, sending "Test Completed at 10:00AM" as the email subject turns into "Test Completed at 10?00AM" on the receiving end. How do I properly format the Subject string to get a colon on the receiving end?

The : (colon) is definitely a reserved SMTP field character. You can customize the Subject content by encoding it as 8-bit and then use the hex value for colon (3A) to encode the colon. Try the exact subject text below; it worked for me using gmail. =?iso-8859-1?Q?Test completed at 10=3A00 AM?=https://en.wikipedia.org/wiki/MIME#Difference_between_Q-encoding_and_quoted-printable

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SMTP Email Palette - Subject text format

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SMTP Email Palette - Subject text format

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