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Amikam Geller, komit.co, August 24, 2014.
I would like to give my highest respect and recommendation for Mr. Zhang.
We've asked Mr. Zhang to develop a few iRedMail features for us (paid). We've worked with total collaboration. The features were ready as scheduled and he was very responsive to our comments and requests. The problems that were encountered during the development phase were fixed with a very high technical knowledge. We are more than satisfied with the results.
Again - I give my highest recommendation for Mr. Zhang and iRedMail as a solution.
Colin Warner, Jun 26, 2014. Migrated from Exim/OpenLDAP to iRedMail.
We received prompt remote support over the following days and he quickly resolved a number of unexpected issues that arose. Zhang communicated regularly during the first two weeks after installation to make sure we were happy with the new mail system, and was pro-active in identifying and fixing problems.
Zhang has excellent written English so there was no difficulty with communication during the whole process. I would highly recommend using Zhang's services to carry out a migration to iRedMail.
Thomas Liesner, 2009-08-27
I ordered remote upgrade support by iRedMail to safely upgrade a production machine to the latest version and everything worked like charm :). Zhang Huangbin logged into the machine exactly at the requested time and informed me live about every single step he was about to do. Being logged in as well, i could follow everything he did and felt really safe. Everything worked so smoothly, that there was no service interruption, no angry users and not a single mail lost. Thanks again, it was well worth the money!