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.IX Title "Mail::Util 3"
.TH Mail::Util 3 2026-10-24 "perl v5.44.0" "User Contributed Perl Documentation"
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Mail::Util \- mail utility functions
.PP
.Vb 1
\&  use Mail::Util qw( ... );
.Ve
.PP
This package provides several mail related utility functions. Any function
required must by explicitly listed on the use line to be exported into
the calling package.
.PP
WARNING:
This method does not quote lines which accidentally also start with the
message separator \f(CW\*(C`From\*(C'\fR, so this implementation can be considered
broken.  See Mail::Box::Mbox
.IP \(bu 4
Look for the MAILDOMAIN environment variable, which can be set from outside the program.  This is by far the best way to configure the domain.
.IP \(bu 4
Look for a sendmail.cf file and extract DH parameter
.IP \(bu 4
Look for a smail config file and usr the first host defined in hostname(s)
.IP \(bu 4
Try an SMTP connect (if Net::SMTP exists) first to mailhost then localhost
.IP \(bu 4
Use value from Net::Domain::domainname (if Net::Domain exists)
.PP
WARNING:
On modern machines, there is only one good way to provide information to
this method: the first; always explicitly configure the MAILDOMAIN.
.PP
.Vb 3
\& # everywhere else
\& use Mail::Util \*(Aqmaildomain\*(Aq;
\& print maildomain;
.Ve
.PP
WARNING:
When not supplied via the environment variable, <mailaddress> looks at
various configuration files and other environmental data. Although this
seems to be smart behavior, this is not predictable enough (IMHO) to
be used.  Please set the MAILADDRESS explicitly, and do not trust on
the "automatic detection", even when that produces a correct address
(on the moment)
.PP
.Vb 3
\& # everywhere else
\& use Mail::Util \*(Aqmailaddress\*(Aq;
\& print mailaddress;
\&
\& # since v2.10
\& mailaddress "me@example.com";
.Ve
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