Technical data

Configuring and Managing SMTP
17.1 Key Concepts
yymmddmmshh_user-name.TCPIP_scnode
where:
yymmddmmshh is the timestamp taken when the file is created.
user-name is the user name of the process in which the control file was created.
Values for this name include:
• TCPIP$SMTP — The mail arrived through SMTP. The file was
created by the SMTP receiver process running in the TCPIP$SMTP
account.
• MAIL$SERVER — The mail arrived over DECnet and was
destined for an SMTP address. In this case, the control file is
created by the DECnet MAIL11 network object that runs the
MAIL$SERVER account. This happens when the user sets mail
forwarding to an SMTP address.
• SYSTEM — If the control file is in the TCPIP$SMTP account
directory, this indicates the message is either undeliverable mail,
or a mail message from the SYSTEM account.
• username — Mail composed by the user and sent to an SMTP
address.
scnode is the value of the SYSGEN SCSNODE parameter.
Control files are written to the TCPIP$SMTP account’s login directory. The
default directory for this account is SYS$SPECIFIC:[TCPIP$SMTP].
17.1.3 Understanding OpenVMS Mail Headers
The OpenVMS Mail utility contains up to four headers on a mail message:
• From:
• To:
• Subj:
• CC:
SMTP supports a large set of mail headers, including:
• Resent-Reply-To:
• Resent-From:
• Reply-To:
• Resent-Sender:
• Sender:
• ReturnPath:
When it composes the OpenVMS Mail message, SMTP uses the text from the first
SMTP header in the list that it finds for the OpenVMS Mail From header.
17.1.4 Understanding SMTP Addresses
SMTP addresses are of the form [e-mail], where domain.name
refers to a domain for which there is a DNS MX record. Mail exchange (MX)
records tell SMTP where to route the mail for the domain.
Configuring and Managing SMTP 17–3