fur and leather stack to 200. how big of bags do you have?!?!
but seriously, post the profile [cause im lazy and dont want to find it myself] and we can look inside.
usually there is a section near the top, above the hotspot section that outlines what to vendor and what to mail.
check out this profile i made awhile back.
PHP:
<HBProfile>
///////////////////////////////////////////////////////////////////////
// Profile Developer: Frosticus
// Farm zone: Townlong Steppes
// Farm mobs: Sra'thik
///////////////////////////////////////////////////////////////////////
<Name>iFarm Windwool Cloth in Townlong Steppes</Name>
<MinFreeBagSlots>3</MinFreeBagSlots>
<MinDurability>0.1</MinDurability>
<MinLevel>90</MinLevel>
<MaxLevel>101</MaxLevel>
<MailGrey>False</MailGrey>
<MailWhite>False</MailWhite>
<MailGreen>True</MailGreen>
<MailBlue>False</MailBlue>
<MailPurple>True</MailPurple>
<SellGrey>True</SellGrey>
<SellWhite>True</SellWhite>
<SellGreen>False</SellGreen>
<SellBlue>True</SellBlue>
<SellPurple>False</SellPurple>
<ProtectedItems>
</ProtectedItems>
<Vendors>
<Vendor Nav="Fly" Name="Commander Oxheart" Entry="64606" Type="Repair" X="2084.738" Y="4902.924" Z="198.5378" />
</Vendors>
<Mailboxes>
<Mailbox Nav="Fly" X="1850.721" Y="4274.083" Z="148.8682" />
</Mailboxes>
<AvoidMobs>
</AvoidMobs>
<Blackspots>
</Blackspots>
once your profile is edited accordingly, you just add your mail target in the settings tab in the HB gui.