The new mail server (Qmail) is available for community.
It’s free. Has small footprint in memory and tries to stay as small as possible at runtime. Thought it is very fast and flexible in configuration.
It was designed for QNX 6 from scratch.
It supports SMTP and POP3 protocols. It can deliver mail through a relay server or directly (resolving MX records).
You can read more about its features and get it here:
The server also supports scanning all mail for viruses. The AVscanner daemon will be available shortly (Based on ClamAV)
With best regards