hmailserver: message undeliverable

https://www.hmailserver.com/forum/viewtopic.php?t=22972
https://www.hmailserver.com/forum/viewtopic.php?t=246
https://www.hmailserver.com/forum/viewtopic.php?t=27158
https://www.hmailserver.com/forum/viewtopic.php?t=716
https://www.hmailserver.com/forum/viewtopic.php?t=24989

https://www.hmailserver.com/documentation/v5.3/?page=userguide_dds

Ethereum: Mining and Gas

https://medium.com/cybermiles/running-a-quick-ethereum-private-network-for-experimentation-and-testing-6b1c23605bce

http://www.ethdocs.org/en/latest/mining.html

https://github.com/ethereum/go-ethereum/wiki/Mining

https://github.com/ethereum/go-ethereum/wiki/Private-network

https://masterthecrypto.com/ethereum-what-is-gas-gas-limit-gas-price/

Exist xml DB:

org.xmldb.api.base.XMLDBException: Failed to invoke method retrieveFirstChunk in class org.exist.xmlrpc.RpcConnection

https://github.com/eXist-db/exist/issues/1863

AWS Metrics for EBS

https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/ebs-metricscollected.html

Mining Test Network

https://medium.com/cybermiles/running-a-quick-ethereum-private-network-for-experimentation-and-testing-6b1c23605bce

VisrtualBox Ubuntu Sharedfolder

https://askubuntu.com/questions/161759/how-to-access-a-shared-folder-in-virtualbox

Ethereum: Docker and Wallet

https://github.com/ethereum/go-ethereum/wiki/Running-in-Docker

https://github.com/ethereum/mist/releases

Blockchain Java

https://medium.com/coinmonks/ethereum-blockchain-hello-world-smart-contract-with-java-9b6ae2961ad1

Blockchain Demo

https://anders.com/blockchain/

VR Portable

http://www.yankodesign.com/2018/07/10/the-handheld-device-thats-replacing-the-arvr-headset/

http://www.yankodesign.com/2018/07/02/lightform-lets-you-design-in-augmented-reality/

Manage MQ via MBeans

https://dzone.com/articles/managing-activemq-jmx-apis

https://alvinalexander.com/java/jwarehouse/activemq/activemq-core/src/test/java/org/apache/activemq/broker/jmx/MBeanTest.java.shtml


https://sourceforge.net/projects/activemqbrowser/

https://github.com/jmxtrans/jmxtrans/tree/master/jmxtrans-examples/src/main/java/com/googlecode/jmxtrans/example

https://github.com/jmxtrans/jmxtrans/blob/master/jmxtrans-examples/src/main/java/com/googlecode/jmxtrans/example/ActiveMQ.java


https://github.com/jmxtrans/jmxtrans/blob/master/jmxtrans-examples/src/main/java/com/googlecode/jmxtrans/example/ActiveMQ2.java