{
    "mode": "perldoc",
    "parameter": "Mail::Message::Head::Delayed",
    "section": "",
    "url": "https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AMessage%3A%3AHead%3A%3ADelayed/json",
    "generated": "2026-06-15T14:51:13Z",
    "synopsis": "my $delayed = Mail::Message::Head::Delayed->new(...)\n$delayed->isa('Mail::Message::Head')  # true\n$delayed->guessBodySize               # undef\n$delayed->isDelayed                   # true",
    "sections": {
        "NAME": {
            "content": "Mail::Message::Head::Delayed - a not-read header of a Mail::Message\n",
            "subsections": []
        },
        "INHERITANCE": {
            "content": "Mail::Message::Head::Delayed realizes a Mail::Message::Head::Complete\n\nMail::Message::Head::Delayed\nis a Mail::Message::Head\nis a Mail::Reporter\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "my $delayed = Mail::Message::Head::Delayed->new(...)\n$delayed->isa('Mail::Message::Head')  # true\n$delayed->guessBodySize               # undef\n$delayed->isDelayed                   # true\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "This object is used as place-holder, to be replaced by a Mail::Message::Head when someone\naccesses the header of a message.\n\nExtends \"DESCRIPTION\" in Mail::Message::Head.\n",
            "subsections": []
        },
        "OVERLOADED": {
            "content": "Extends \"OVERLOADED\" in Mail::Message::Head.\n\noverload: \"\"\nInherited, see \"OVERLOADED\" in Mail::Message::Head\n\noverload: bool\nInherited, see \"OVERLOADED\" in Mail::Message::Head\n",
            "subsections": []
        },
        "METHODS": {
            "content": "Extends \"METHODS\" in Mail::Message::Head.\n",
            "subsections": [
                {
                    "name": "Constructors",
                    "content": "Extends \"Constructors\" in Mail::Message::Head.\n\n$obj->build($fields)\nYou cannot create a delayed header with fields.\n\nMail::Message::Head::Delayed->new(%options)\nInherited, see \"Constructors\" in Mail::Message::Head\n"
                },
                {
                    "name": "The header",
                    "content": "Extends \"The header\" in Mail::Message::Head.\n\n$obj->isDelayed()\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->isEmpty()\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->isModified()\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->knownNames()\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->message( [$message] )\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->modified( [BOOLEAN] )\nInherited, see \"The header\" in Mail::Message::Head\n\n$obj->orderedFields()\nInherited, see \"The header\" in Mail::Message::Head\n"
                },
                {
                    "name": "Access to the header",
                    "content": "Extends \"Access to the header\" in Mail::Message::Head.\n\n$obj->get( $name, [$index] )\nGet the information about the header line $name. Realization will take place.\n\n$obj->study( $name, [$index] )\nInherited, see \"Access to the header\" in Mail::Message::Head\n"
                },
                {
                    "name": "About the body",
                    "content": "Extends \"About the body\" in Mail::Message::Head.\n\n$obj->guessBodySize()\nOn a delayed head, this returns \"undef\", because when there is no header there is also no\nbody.\n\nFor messages in directory or network organized folders, Mail::Message::size() usually will\ngive a figure for the whole message without much cost. Subtract a few hundred bytes for the\nheader, and you will get a good estimate.\n\n$obj->guessTimeStamp()\nMake a guess about when the message was originally posted. On a delayed head, this returns\n\"undef\". For messages in directory or network organized folders, Mail::Message::timestamp()\nusually will give a figure without much cost.\n\n$obj->isMultipart()\nInherited, see \"About the body\" in Mail::Message::Head\n"
                },
                {
                    "name": "Internals",
                    "content": "Extends \"Internals\" in Mail::Message::Head.\n\n$obj->addNoRealize($field)\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->addOrderedFields($fields)\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->fileLocation()\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->load()\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->moveLocation($distance)\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->read($parser)\nInherited, see \"Internals\" in Mail::Message::Head\n\n$obj->setNoRealize($field)\nInherited, see \"Internals\" in Mail::Message::Head\n"
                },
                {
                    "name": "Error handling",
                    "content": "Extends \"Error handling\" in Mail::Message::Head.\n\n$obj->AUTOLOAD()\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->addReport($object)\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )\nMail::Message::Head::Delayed->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level,\n$callback] )\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->errors()\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->log( [$level, [$strings]] )\nMail::Message::Head::Delayed->log( [$level, [$strings]] )\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->logPriority($level)\nMail::Message::Head::Delayed->logPriority($level)\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->logSettings()\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->notImplemented()\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->report( [$level] )\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->reportAll( [$level] )\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->trace( [$level] )\nInherited, see \"Error handling\" in Mail::Reporter\n\n$obj->warnings()\nInherited, see \"Error handling\" in Mail::Reporter\n"
                },
                {
                    "name": "Cleanup",
                    "content": "Extends \"Cleanup\" in Mail::Message::Head.\n\n$obj->DESTROY()\nInherited, see \"Cleanup\" in Mail::Reporter\n"
                }
            ]
        },
        "DETAILS": {
            "content": "Extends \"DETAILS\" in Mail::Message::Head.\n",
            "subsections": []
        },
        "DIAGNOSTICS": {
            "content": "Error: Cannot build() a delayed header.\nA delayed message header cannot contain any information, so cannot be build. You can\nconstruct complete or subset headers.\n\nError: Package $package does not implement $method.\nFatal error: the specific package (or one of its superclasses) does not implement this\nmethod where it should. This message means that some other related classes do implement this\nmethod however the class at hand does not. Probably you should investigate this and probably\ninform the author of the package.\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "This module is part of Mail-Box distribution version 3.009, built on August 18, 2020. Website:\nhttp://perl.overmeer.net/CPAN/\n",
            "subsections": []
        },
        "LICENSE": {
            "content": "Copyrights 2001-2020 by [Mark Overmeer]. For other contributors see ChangeLog.\n\nThis program is free software; you can redistribute it and/or modify it under the same terms as\nPerl itself. See http://dev.perl.org/licenses/\n",
            "subsections": []
        }
    },
    "summary": "Mail::Message::Head::Delayed - a not-read header of a Mail::Message",
    "flags": [],
    "examples": [],
    "see_also": []
}