Provided by: libmail-message-perl_3.019-1_all 
NAME
Mail::Message::Body::Nested - body of a message which contains a message
INHERITANCE
Mail::Message::Body::Nested
is a Mail::Message::Body
is a Mail::Reporter
SYNOPSIS
See Mail::Message::Body
if($body->isNested) {
my $nest = $body->nested;
$nest->delete;
}
DESCRIPTION
The body (content) of a message can be stored in various ways. In this manual-page you find the
description of extra functionality you have when a message contains a nested message, like
"message/rfc822".
A nested message is different from a multipart message which contains only one element, because a nested
message has a full set of message header fields defined by the RFC882, where a part of a multipart has
only a few. But because we do not keep track whether all fields are presented, a "Mail::Message::Part"
is used anyway.
WARNING: Since 2023, at least outlook started to interpret RFC6533 incorrectly. Bodies of type
'message/rfc822' can only be 'nested', but when they (illegally) have Content-Transfer-Encoding, they can
now behave like normal message parts (the same as a pdf or image).
Extends "DESCRIPTION" in Mail::Message::Body.
OVERLOADED
Extends "OVERLOADED" in Mail::Message::Body.
overload: "" stringification
Inherited, see "OVERLOADED" in Mail::Message::Body
overload: '==' numerical comparison
Inherited, see "OVERLOADED" in Mail::Message::Body
overload: @{} addressed as array
Inherited, see "OVERLOADED" in Mail::Message::Body
overload: bool true/false
Inherited, see "OVERLOADED" in Mail::Message::Body
METHODS
Extends "METHODS" in Mail::Message::Body.
Constructors
Extends "Constructors" in Mail::Message::Body.
$obj->clone()
Inherited, see "Constructors" in Mail::Message::Body
$class->new(%options)
Inherited, see "Constructors" in Mail::Message::Body
-Option --Defined in --Default
based_on Mail::Message::Body undef
charset Mail::Message::Body 'PERL'
checked Mail::Message::Body false
content_id Mail::Message::Body undef
data Mail::Message::Body undef
description Mail::Message::Body undef
disposition Mail::Message::Body undef
eol Mail::Message::Body 'NATIVE'
file Mail::Message::Body undef
filename Mail::Message::Body undef
language Mail::Message::Body undef
log Mail::Reporter 'WARNINGS'
message Mail::Message::Body undef
mime_type Mail::Message::Body 'message/rfc822'
modified Mail::Message::Body <C<false>>
nested undef
trace Mail::Reporter 'WARNINGS'
transfer_encoding Mail::Message::Body 'none'
based_on => BODY
charset => CHARSET|'PERL'|<undef>
checked => BOOLEAN
content_id => STRING
data => ARRAY-OF-LINES | STRING
description => STRING|FIELD
disposition => STRING|FIELD
eol => 'CR'|'LF'|'CRLF'|'NATIVE'
file => FILENAME|FILEHANDLE|IOHANDLE
filename => FILENAME
language => STRING|ARRAY|LIST|FIELD
log => LEVEL
message => MESSAGE
mime_type => STRING|FIELD|MIME
modified => BOOLEAN
nested => MESSAGE
The message which is encapsulated within this body.
trace => LEVEL
transfer_encoding => STRING|FIELD
ยป example:
my $msg = $folder->message(3);
my $encaps= Mail::Message::Body::Nested->new(nested => $msg);
# The body will be coerced into a message, which lacks a few
# lines but we do not bother.
my $intro = Mail::Message::Body->new(data => ...);
my $body = Mail::Message::Body::Nested->new(nested => $intro);
Attributes
Extends "Attributes" in Mail::Message::Body.
$obj->charsetDetectAlgorithm( [CODE|undef|METHOD] )
Inherited, see "Attributes" in Mail::Message::Body::Encode
$obj->logSettings()
Inherited, see "Attributes" in Mail::Reporter
Constructing a body
Extends "Constructing a body" in Mail::Message::Body.
$obj->attach(@messages, %options)
Inherited, see "Constructing a body" in Mail::Message::Body::Construct
$obj->charsetDetect(%options)
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
$obj->check()
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
$obj->concatenate(@components)
Inherited, see "Constructing a body" in Mail::Message::Body::Construct
$obj->decoded(%options)
Inherited, see "Constructing a body" in Mail::Message::Body
$obj->encode(%options)
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
$obj->encoded(%options)
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
$obj->eol( ['CR'|'LF'|'CRLF'|'NATIVE'] )
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
$obj->foreachLine((CODE))
It is NOT possible to call some code for each line of a nested because that would damage the header
of the encapsulated message Improves base, see "Constructing a body" in
Mail::Message::Body::Construct
$obj->stripSignature(%options)
Inherited, see "Constructing a body" in Mail::Message::Body::Construct
$obj->unify($body)
Inherited, see "Constructing a body" in Mail::Message::Body::Encode
The body
Extends "The body" in Mail::Message::Body.
$obj->isDelayed()
Inherited, see "The body" in Mail::Message::Body
$obj->isMultipart()
Inherited, see "The body" in Mail::Message::Body
$obj->isNested()
Inherited, see "The body" in Mail::Message::Body
$obj->message( [$message] )
Inherited, see "The body" in Mail::Message::Body
$obj->partNumberOf($part)
Inherited, see "The body" in Mail::Message::Body
About the payload
Extends "About the payload" in Mail::Message::Body.
$obj->charset()
Inherited, see "About the payload" in Mail::Message::Body
$obj->checked( [BOOLEAN] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->contentId( [STRING|$field] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->description( [STRING|$field] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->disposition( [STRING|$field] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->dispositionFilename( [$directory] )
Inherited, see "About the payload" in Mail::Message::Body::Encode
$obj->isBinary()
Inherited, see "About the payload" in Mail::Message::Body::Encode
$obj->isText()
Inherited, see "About the payload" in Mail::Message::Body::Encode
$obj->language( [@langs|\@langs|$langs|$field] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->mimeType()
Inherited, see "About the payload" in Mail::Message::Body
$obj->nrLines()
Inherited, see "About the payload" in Mail::Message::Body
$obj->size()
Inherited, see "About the payload" in Mail::Message::Body
$obj->transferEncoding( [STRING|$field] )
Inherited, see "About the payload" in Mail::Message::Body
$obj->type( [STRING|$field] )
Inherited, see "About the payload" in Mail::Message::Body
Access to the payload
Extends "Access to the payload" in Mail::Message::Body.
$obj->endsOnNewline()
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->file()
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->forNested(CODE)
Execute the "CODE" for the nested message. This returns a new nested body object. Returns "undef"
when the "CODE" returns "undef".
$obj->lines()
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->nested()
Returns the Mail::Message::Part message which is enclosed within this body.
$obj->print( [$fh] )
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->printEscapedFrom($fh)
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->string()
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->stripTrailingNewline()
Inherited, see "Access to the payload" in Mail::Message::Body
$obj->write(%options)
Inherited, see "Access to the payload" in Mail::Message::Body
Internals
Extends "Internals" in Mail::Message::Body.
$any->addTransferEncHandler( $name, <$class|$object> )
Inherited, see "Internals" in Mail::Message::Body::Encode
$obj->contentInfoFrom($head)
Inherited, see "Internals" in Mail::Message::Body
$obj->contentInfoTo($head)
Inherited, see "Internals" in Mail::Message::Body
$obj->fileLocation( [$begin, $end] )
Inherited, see "Internals" in Mail::Message::Body
$obj->getTransferEncHandler($type)
Inherited, see "Internals" in Mail::Message::Body::Encode
$obj->isModified()
Inherited, see "Internals" in Mail::Message::Body
$obj->load()
Inherited, see "Internals" in Mail::Message::Body
$obj->modified( [BOOLEAN] )
Inherited, see "Internals" in Mail::Message::Body
$obj->moveLocation( [$distance] )
Inherited, see "Internals" in Mail::Message::Body
$obj->read( $parser, $head, $bodytype, [$chars, [$lines]] )
Inherited, see "Internals" in Mail::Message::Body
Error handling
Extends "Error handling" in Mail::Message::Body.
$obj->AUTOLOAD()
Inherited, see "Error handling" in Mail::Message::Body
$obj->addReport($object)
Inherited, see "Error handling" in Mail::Reporter
$any->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
Inherited, see "Error handling" in Mail::Reporter
$obj->errors()
Inherited, see "Error handling" in Mail::Reporter
$any->log( [$level, [$strings]] )
Inherited, see "Error handling" in Mail::Reporter
$any->logPriority($level)
Inherited, see "Error handling" in Mail::Reporter
$obj->notImplemented()
Inherited, see "Error handling" in Mail::Reporter
$obj->report( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->reportAll( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->trace( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->warnings()
Inherited, see "Error handling" in Mail::Reporter
Cleanup
Extends "Cleanup" in Mail::Message::Body.
$obj->DESTROY()
Inherited, see "Cleanup" in Mail::Reporter
DETAILS
Extends "DETAILS" in Mail::Message::Body.
DIAGNOSTICS
Warning: Charset $name is not known
The encoding or decoding of a message body encounters a character set which is not understood by
Perl's Encode module. Cast by encode()
Warning: Content-Transfer-Encoding `$encoding' requires explicit charset, defaulted to utf-8
Cast by encode()
Warning: No decoder defined for transfer encoding $name.
The data (message body) is encoded in a way which is not currently understood, therefore no decoding
(or recoding) can take place. Cast by encode()
Warning: No encoder defined for transfer encoding $name.
The data (message body) has been decoded, but the required encoding is unknown. The decoded data is
returned. Cast by encode()
Error: Package $package does not implement $method.
Fatal error: the specific package (or one of its superclasses) does not implement this method where
it should. This message means that some other related classes do implement this method however the
class at hand does not. Probably you should investigate this and probably inform the author of the
package. Cast by notImplemented()
Warning: Unknown line terminator $eol ignored
Cast by eol()
Error: You cannot use foreachLine on a nested
foreachLine() should be used on decoded message bodies only, because it would modify the header of
the encapsulated message. which is clearly not acceptable. Cast by foreachLine()
SEE ALSO
This module is part of Mail-Message version 3.019, built on November 24, 2025. Website:
http://perl.overmeer.net/CPAN/
LICENSE
For contributors see file ChangeLog.
This software is copyright (c) 2001-2025 by Mark Overmeer.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
programming language system itself.
perl v5.40.1 2025-12-07 Mail::Message::Body::Nested(3pm)