I stole this from Wikipedia:
SiliBank is a financial institution based in Shenyang, Liaoning, China, closely related to the Democratic People’s Republic of Korea (DPRK).
The name “sili” means “true profit” in both Chinese and Korean.
In 2001 the bank began offering a limited electronic mail relay service to and from North Korea where Internet access with outside is limited. Along with Chesin.com, SiliBank appears to be one of only two e-mail gates to DPRK.
SiliBank maintains dedicated servers in Pyongyang and Shenyang, between which e-mail transmissions are exchanged once every 10 minutes (when the service commenced, this was hourly).
The fee for sending an e-mail to North Korea from abroad (as of May 10, 2003) costs 10 Eurocents per kilobyte for up to 40 kilobytes, and 0.2 Eurocents for each additional kilobyte in each e-mail transmission. The minimum charge per e-mail is 1 Euro. Customers must first pre-register with SiliBank with prepayment for estimated usage over a three-month period. SiliBank only allows e-mail relay between registered users of this service.
