Cjay said:I too have just enabled email on V6 (664) and find that it is not working (worked fine on previous version). In my case I have taken a Wireshark capture and can see that the 3cx server is trying to send the mail notification but I see checksum errors on the outgoing packets heading to my ISP's SMTP server and the response from the SMTP server 'Syntactically invalid HELO argument(s)'.
Is this topic still under investigation?
Regds,
Chris
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.