Informational: conf CR_FILE file empty: /etc/mail/relay-domains Informational: conf CT_FILE file empty: /etc/mail/trusted-users Updating /etc/mail/access... WARNING: local host name (ixtmixilix) is not qualified; see cf/README: WHO AM I?
To reduce the amount of spam sent to Gmail, 050 550-5.7.1 this message has been blocked.
It's referring to this page from the readme, which tells you how to specify your hostname.
I have installed sendmail and trying to use a basic mail function in a php page that works on another server.
Have tried a few command line test emails that both worked fine.
Sendmail requires libsasl in order to properly send authentication requests to Send Grid servers.
The saslauthd server daemon is not required unless you plan to receive authentication requests to the same server.