To disable the modifications that TCPIP SMTP makes to the value
    you assign to TCPIP$SMTP_FROM (such as appending the OpenVMS
    personal name and @domain to a value with no @domain), include
    the string [VERBATIM].

    For example:

    $ DEFINE TCPIP$SMTP_FROM "[VERBATIM] bill.smith@xxx.com"

    The resulting address is as follows:

    From: bill.smith@xxx.com