I was given a packet of mail to deliver to the town crier in Ardoris, in return for a bit of gold.
After all the things to do in Soltown I travelled to Ardoris, a jewel of Perennial Coast. I found the Ardoris town crier just after the long bridge after main gate.
I was paid 75 gold for delivering a package of mail to Ardoris succesfully. The town crier there told me I could do this again if I wished.