Our Products and Items

Our Products and Items

Sisimai Commercial Support and others

Sisimai We Cubicroot Company Limited are developing "Sisimai": A library to parse bounce emails due to delivery errors.

bounceHammer was downloaded and used by many users and companies since the first release of bounceHammer on March 2010. Sisimai is developed as the successor of bounceHammer and is distributed with 2-Clause BSD License at libsisimai.org.


On August 2014, we have started to develop Sisimai to resolve many problems of bounceHammer which are related to analytical precision and many dependent modules, and Sisimai have included (ported) all the modules for parsing bounce mails from commercial MTAs/MSPs in bounceHammer-nails.


Anyone can use Sisimai because it is an Open Source Software, however, we are ready to support your installation of Sisimai, development of relevant scripts, management of parsed bounces, and operation of a system for continuous management of email bounces.

To getting more information about Sisimai, Contact Us

bounceHammer Commercial Support

bounceHammer bounceHammer has been EOL: End Of Life on February 29, 2016 and bounceHammer Commercial Support has been EOS: End Of Sales on the same day of EOL of bounceHammer.


Installed bounceHammer could be continued to use, however, we recommend to migrate from bounceHammer to Sisimai which has resolved many problems related with analytical precision of bounceHammer.

bounceHammer-nails: MTA Modules for Commercial MTAs

bounceHammer-nails has been EOS on the same day of EOL of bounceHammer.


Installed bounceHammer-nails also could be continued to use, however, we recommend to migrate to Sisimai because all the modules of bounceHammer-nails have ported to Sisimai.

To getting more information about Sisimai, Contact Us