"FastEcho FAQ" (in Russian). 13 December 2001. Retrieved 14 March 2009.
softeq.de
"Product homepage". FastEcho website. Tobias Burchhardt. Retrieved 10 March 2017. Registration keys are nowadays available free of charge on request!
web.archive.org
Damian Walker (19 August 1996). "Six Mail Processors Reviewed". FidoNews Volume 13, Number 34, Page 8 ff. Archived from the original on 28 August 2004. Retrieved 10 March 2017.
worldpowersystems.com
Damian Walker (19 August 1996). "Six Mail Processors Reviewed". FidoNews Volume 13, Number 34, Page 8 ff. Archived from the original on 28 August 2004. Retrieved 10 March 2017.
