Before you ask a question, please search through the old thread over at https://forum.lowyat.net/topic/106419 first, or at least read the first few posts.

Pos Malaysia's website
Pos Laju online tracking service (Usually updated at around 10AM or 11PM) Update: Appears that some have trouble with this, so you can try here or here as well.
Pos Laju rates (Remember to read the fine print. Certain cost not included yet one)
Pos Malaysia Network (Addresses, direct contact info etc). Pos Laju can also be delivered through a third party company called Mailboxes Etc
Pos Laju pickup service coverage and details
More Pos Laju services
Pos Malaysia customer service tollfree hotline: 1-300-300-300 (Operating Hours: Mon – Fri : 8.30am to 8.00pm ; Saturdays: 8:30 am to 5:00 pm)
Pos Malaysia customer service email address: csc@pos.com.my
Second delivery is FOC. Contact Pos Laju to arrange
Shall update this with more info later

Pos Laju account requirements and T&C (As of July 2011)
!! Accounts can only be opened if you have a company !!
Form PL13 (Poslaju )
Form 9/13
Form 24
Form 49
photo copy of Director’s IC/Manager
Rates quoted is subject to 10% Handling surcharge, 15% Fuel Surcharge and 6% Goverment tax.
All posting is subject to PosLaju standard terms & conditions.
For item weight more than 30kg, the 6% GST tax is not applicable.
The chargeable rate is based on the actual weight of the item or by volumetric calculation, which ever is higher.
Payment term is 30 days from the date of invoice.
Compensation coverage: For damages or loss in transit, item weight less than 2kg is entitled for claim a maximum of RM100 per consignment and for item more than 2kg is entitled for claim a maximum RM300 per consignment or the actual cost/value of the item whichever is lower.
All claims should be reported within one (1) working day from the date receipt.