# Mail::Message::Field::URIs - message header field with uris - perldoc - [phpMan]

## NAME
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown) - message header field with uris

## INHERITANCE
     [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)
       is a [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)
       is a [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)
       is a [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)
       is a [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

## SYNOPSIS
     my $f = [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)->new('List-Post' => '<http://x.org/>');

     my $g = [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)->new('List-Post');
     $g->addURI('<http://x.org>');

     my $uri = URI->new(...);
     $g->addURI($uri);

     my @uris = $g->URIs;

## DESCRIPTION
    More recent RFCs prefer uri field notation over the various differentiated syntaxes. Especially
    the mailing-list RFCs use these fields all the time. This class can maintain these fields.

    Extends "DESCRIPTION" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

## OVERLOADED
    Extends "OVERLOADED" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    overload: ""
        Inherited, see "OVERLOADED" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    overload: 0+
        Inherited, see "OVERLOADED" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    overload: <=>
        Inherited, see "OVERLOADED" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    overload: bool
        Inherited, see "OVERLOADED" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    overload: cmp
        Inherited, see "OVERLOADED" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    overload: stringification
        Inherited, see "OVERLOADED" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

## METHODS
    Extends "METHODS" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

### Constructors
    Extends "Constructors" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->clone()
        Inherited, see "Constructors" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->from($field, %options)
        Inherited, see "Constructors" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->new($data)
         -Option    --Defined in                      --Default
          attributes  [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)  <ignored>
          charset     [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)        undef
          datum       [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)  undef
          encoding    [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)        'q'
          force       [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)        false
          language    [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)        undef
          log         [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)                    'WARNINGS'
          trace       [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)                    'WARNINGS'

        attributes => ATTRS
        charset => STRING
        datum => STRING
        encoding => 'q'|'Q'|'b'|'B'
        force => BOOLEAN
        language => STRING
        log => LEVEL
        trace => LEVEL

        example:

         my $mmfu = '[Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown);
         my $f = $mmfu->new('List-Post' => 'mailto:<x@y.com>');
         my $f = $mmfu->new('List-Post' => '<mailto:<x@y.com>>');
         my $f = $mmfu->new('List-Post: <mailto:<x@y.com>>');
         my $f = $mmfu->new('List-Post' => [ $uri, '<http://x.org>' ]);

### The field
    Extends "The field" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->isStructured()
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->isStructured()
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->length()
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->nrLines()
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->print( [$fh] )
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->size()
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->string( [$wrap] )
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->toDisclose()
        Inherited, see "The field" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Access to the name
    Extends "Access to the name" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->Name()
        Inherited, see "Access to the name" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->name()
        Inherited, see "Access to the name" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->wellformedName( [STRING] )
        Inherited, see "Access to the name" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Access to the body
    Extends "Access to the body" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->body()
        Inherited, see "Access to the body" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->decodedBody(%options)
        Inherited, see "Access to the body" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->folded()
        Inherited, see "Access to the body" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->foldedBody( [$body] )
        Inherited, see "Access to the body" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->stripCFWS( [STRING] )
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->stripCFWS( [STRING] )
        Inherited, see "Access to the body" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->unfoldedBody( [$body, [$wrap]] )
        Inherited, see "Access to the body" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Access to the content
    Extends "Access to the content" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->URIs()
        Returns a list with all URIs defined by the field. Mind the lower-case 's' at the enc of the
        name.

        example:

         my @uris = $field->URIs;

    $obj->addAttribute(...)
        Attributes are not supported for URI fields.

    $obj->addURI($uri)
        Add an $uri to the field. The $uri can be specified as URI object or as string which will be
        turned into an $uri object. The added $uri is returned.

        example: adding an URI to an URI field

         my $f   = [Mail::Message::Field::URI](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURI/markdown)->new('List-Post');

         my $uri = URI->new("<http://x.org>");
         $f->addURI($uri);

         $f->addURI("<http://y.org>");  # simpler
         $f->addURI("//y.org", "http");

    $obj->addresses()
        Inherited, see "Access to the content" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->attrPairs()
        Inherited, see "Access to the content" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)

    $obj->attribute( $object|<STRING, %options>|<$name,$value,%options> )
        Inherited, see "Access to the content" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)

    $obj->attributes()
        Inherited, see "Access to the content" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)

    $obj->beautify()
        Inherited, see "Access to the content" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->comment( [STRING] )
        Inherited, see "Access to the content" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->createComment(STRING, %options)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->createComment(STRING, %options)
        Inherited, see "Access to the content" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->createPhrase(STRING, %options)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->createPhrase(STRING, %options)
        Inherited, see "Access to the content" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->study()
        Inherited, see "Access to the content" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->toDate( [$time] )
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->toDate( [$time] )
        Inherited, see "Access to the content" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->toInt()
        Inherited, see "Access to the content" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Other methods
    Extends "Other methods" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->dateToTimestamp(STRING)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->dateToTimestamp(STRING)
        Inherited, see "Other methods" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Internals
    Extends "Internals" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->consume( $line | <$name,<$body|$objects>> )
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->decode(STRING, %options)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->decode(STRING, %options)
        Inherited, see "Internals" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->defaultWrapLength( [$length] )
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->encode(STRING, %options)
        Inherited, see "Internals" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->fold( $name, $body, [$maxchars] )
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->fold( $name, $body, [$maxchars] )
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->setWrapLength( [$length] )
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->stringifyData(STRING|ARRAY|$objects)
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

    $obj->unfold(STRING)
        Inherited, see "Internals" in [Mail::Message::Field](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField/markdown)

### Parsing
    Extends "Parsing" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->consumeComment(STRING)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->consumeComment(STRING)
        Inherited, see "Parsing" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->consumeDotAtom(STRING)
        Inherited, see "Parsing" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->consumePhrase(STRING)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->consumePhrase(STRING)
        Inherited, see "Parsing" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->datum( [$value] )
        Inherited, see "Parsing" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown)

    $obj->parse(STRING)
        Inherited, see "Parsing" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

    $obj->produceBody()
        Inherited, see "Parsing" in [Mail::Message::Field::Full](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AFull/markdown)

### Error handling
    Extends "Error handling" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->AUTOLOAD()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->addReport($object)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback]
    )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->errors()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->log( [$level, [$strings]] )
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->log( [$level, [$strings]] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logPriority($level)
    [Mail::Message::Field::URIs](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AURIs/markdown)->logPriority($level)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logSettings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->notImplemented()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->report( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->reportAll( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->trace( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->warnings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

### Cleanup
    Extends "Cleanup" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

    $obj->DESTROY()
        Inherited, see "Cleanup" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

## DETAILS
    Extends "DETAILS" in [Mail::Message::Field::Structured](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AField%3A%3AStructured/markdown).

## DIAGNOSTICS
    Warning: Field content is not numerical: $content
        The numeric value of a field is requested (for instance the "Lines" or "Content-Length"
        fields should be numerical), however the data contains weird characters.

    Error: Field name too long (max $length), in '$name'
        It is not specified in the RFCs how long a field name can be, but at least it should be a
        few characters shorter than the line wrap.

    Warning: Illegal character in charset '$charset'
        The field is created with an utf8 string which only contains data from the specified
        character set. However, that character set can never be a valid name because it contains
        characters which are not permitted.

    Warning: Illegal character in field name $name
        A new field is being created which does contain characters not permitted by the RFCs. Using
        this field in messages may break other e-mail clients or transfer agents, and therefore
        mutulate or extinguish your message.

    Warning: Illegal character in language '$lang'
        The field is created with data which is specified to be in a certain language, however, the
        name of the language cannot be valid: it contains characters which are not permitted by the
        RFCs.

    Warning: Illegal encoding '$encoding', used 'q'
        The RFCs only permit base64 ("b " or "B ") or quoted-printable ("q" or "Q") encoding. Other
        than these four options are illegal.

    Error: No attributes for URI fields.
        Is is not possible to add attributes to URI fields: it is not permitted by the RFCs.

    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.

## SEE ALSO
    This module is part of Mail-Message distribution version 3.015, built on December 11, 2023.
    Website: <http://perl.overmeer.net/CPAN/>

## LICENSE
    Copyrights 2001-2023 by [Mark Overmeer <<markov@cpan.org>>]. For other contributors see ChangeLog.

    This program is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself. See <http://dev.perl.org/licenses/>