Our 11month old malamute has always dribbled alot when panting but recently we have noticed she has got a kind of stain down one side of her lower jaw and wanted to know is this normal. We have had a look and there does not seem to be any teething issues also she is still eating and chewing her toys as normal. We would apprieciate any advice as this is our first Mal.

Some Mals can be dribblers.Out of my 6 Mals,Shadow a large Seal and White boy is a dribbler at the sight/sound/smell and mention of the word food.No health issues just a dribbler,though no staining luckily.
The staining you mention is caused by the enzymes in the saliva.Have you checked her jaw to check his 'bite'which in a mal should be a scissor bite.It is an increasingly growing problem of under and over shot jaws which if minor will cause no eating problems but could cause a dribble.She may be a dog that just produces larger quantities of saliva.At 11 months I wouldn't expect gum disease(gingivitis),(does your woo have smelly breath?)Excitement causes excess salivation(playtime/walks and especially smells stimulate this),so when she pants is this following playtime/walks etc or does she pant excessively as well?At your Mals next check up - she should be due her next booster soon,get her checked out.
Jude

Also now people are putting their heating on could she be hot and panting more? 

My Elkies spend most of their time in the unheated kitchen, with tile floor on concrete.

Good point Barbara,with our Mals and CEDS it either put the central heating on and have every window and door open or leave the heating off and have contented dogs,but OH pulling my blanket off me to cover his cold toes LOL.

Yes we've been trying to either not put our heating on or if we do we open the door and windows so either way we are freezing but she's more comfortable!!!
Thanks for the advice, her bite is perfect but think I will just mention it to the vet when she has her booster.

Loose flews can cause drooling.  Not typical in this breed but I have seen it in some.