DHL and FEDEX are here:
www.dhl.co.thwww.fedex.com/th/Try also TNT, they have an office near Phailin square and a website (make a search...it's probably
www.tnt.com !!)
Thai post site :
http://www.thailandpost.com/search_ems_en.aspIt depends on what do you want to ship, how fast, the size, etc. Thai Post is quite good by boat but it takes 2 months. I never had problems to ship in Canada. A friend of mine can't use it for South Africa because it never arrives. (Stolen in South Africa)...I heard the same stories in Netherlands, when an envelop looks like it has some money into it. (Stolen in Thailand)
Now, if you ship by EMS (Thai post, plane) it's expensive and the service is not like DHL ou FEDEX.
If you export, FEDEX includes custom broker fees, which is quite good.
If you want to send a container, you must use other companies.