The following email providers usually always have issues with receiving email from @captainsim.com because they can't tell spam from a real email.

Please DO NOT use them for the forum registration and products purchasing. Also do not attempt to contact us from these providers:

- msn (hotmail.com, msn.com, outlook.com, live.com etc)
- yahoo (ymail, rocketmail.com etc)
- aol (aol.com, aim.com etc)
- bellsouth.net
- comcast.net
- orange (orange.fr, wanadoo.fr, orangehome.co.uk etc)
- att.net
- optonline.net
- alice.it (aliceposta.it etc)
- free.fr
- verizon.net
- rogers.com
- sky.com

OTHERWISE YOU WILL RECEIVE NO EMAIL FROM CS, MEANS NO FORUM REGISTRATION, NO PRODUCTS 

We'd recommend using GMAIL.

Meanwhile this may help.