You have to make sure it's properly configured in the profile
Somewhere in your profile you'll have a sections like this:
<MailGrey>False</MailGrey>
<MailWhite>False</MailWhite>
<MailGreen>True</MailGreen>
<MailBlue>True</MailBlue>
<MailPurple>True</MailPurple>
<SellGrey>True</SellGrey>
<SellWhite>True</SellWhite>
<SellGreen>False</SellGreen>
<SellBlue>True</SellBlue>
<SellPurple>False</SellPurple>
Just make sure sellgreen is false and mailgreen is true.
good luck