Wireshark · Display Filter Reference: Internet Message Format

Field name	Description	Type	Versions
imf.address	Address	Character string	1.0.0 to 4.4.2
imf.address_list	Address List	Unsigned integer (32 bits)	1.0.0 to 1.8.15
imf.address_list.item	Item	Character string	1.0.0 to 4.4.2
imf.autoforwarded	Autoforwarded	Character string	1.0.0 to 4.4.2
imf.autosubmitted	Autosubmitted	Character string	1.0.0 to 4.4.2
imf.bcc	Bcc	Character string	1.0.0 to 4.4.2
imf.cc	Cc	Character string	1.0.0 to 4.4.2
imf.comments	Comments	Character string	1.0.0 to 4.4.2
imf.content.description	Content-Description	Character string	1.0.0 to 4.4.2
imf.content.id	Content-ID	Character string	1.0.0 to 4.4.2
imf.content.transfer_encoding	Content-Transfer-Encoding	Character string	1.0.0 to 4.4.2
imf.content.type	Content-Type	Character string	1.0.0 to 4.4.2
imf.content.type.parameters	Parameters	Character string	1.0.0 to 4.4.2
imf.content.type.type	Type	Character string	1.0.0 to 4.4.2
imf.content_language	Content-Language	Character string	1.0.0 to 4.4.2
imf.conversion	Conversion	Character string	1.0.0 to 4.4.2
imf.conversion_with_loss	Conversion-With-Loss	Character string	1.0.0 to 4.4.2
imf.date	Date	Character string	1.0.0 to 4.4.2
imf.deferred_delivery	Deferred-Delivery	Character string	1.0.0 to 4.4.2
imf.delivered_to	Delivered-To	Character string	1.2.0 to 4.4.2
imf.delivery_date	Delivery-Date	Character string	1.0.0 to 4.4.2
imf.discarded_x400_ipms_extensions	Discarded-X400-IPMS-Extensions	Character string	1.0.0 to 4.4.2
imf.discarded_x400_mts_extensions	Discarded-X400-MTS-Extensions	Character string	1.0.0 to 4.4.2
imf.display_name	Display-Name	Character string	1.0.0 to 4.4.2
imf.dl_expansion_history	DL-Expansion-History	Character string	1.0.0 to 4.4.2
imf.expires	Expires	Character string	1.0.0 to 4.4.2
imf.ext.authentication_warning	X-Authentication-Warning	Character string	1.2.0 to 4.4.2
imf.ext.expiry-date	Expiry-Date	Character string	1.0.0 to 4.4.2
imf.ext.mailer	X-Mailer	Character string	1.0.0 to 4.4.2
imf.ext.mimeole	X-MimeOLE	Character string	1.0.0 to 4.4.2
imf.ext.original-to	X-Original-To	Character string	4.0.0 to 4.4.2
imf.ext.tnef-correlator	X-MS-TNEF-Correlator	Character string	1.0.0 to 4.4.2
imf.ext.uidl	X-UIDL	Character string	1.2.0 to 4.4.2
imf.ext.virus_scanned	X-Virus-Scanned	Character string	1.2.0 to 4.4.2
imf.extension	Unknown-Extension	Character string	1.0.0 to 4.4.2
imf.extension.type	Type	Character string	1.0.0 to 4.4.2
imf.extension.value	Value	Character string	1.0.0 to 4.4.2
imf.from	From	Character string	1.0.0 to 4.4.2
imf.importance	Importance	Character string	1.0.0 to 4.4.2
imf.in_reply_to	In-Reply-To	Character string	1.0.0 to 4.4.2
imf.incomplete_copy	Incomplete-Copy	Character string	1.0.0 to 4.4.2
imf.keywords	Keywords	Character string	1.0.0 to 4.4.2
imf.latest_delivery_time	Latest-Delivery-Time	Character string	1.0.0 to 4.4.2
imf.lines	Lines	Character string	4.0.0 to 4.4.2
imf.mailbox_list	Mailbox List	Unsigned integer (32 bits)	1.0.0 to 1.8.15
imf.mailbox_list.item	Item	Character string	1.0.0 to 4.4.2
imf.message_id	Message-ID	Character string	1.0.0 to 4.4.2
imf.message_text	Message-Text	Label	1.2.0 to 4.4.2
imf.message_type	Message-Type	Character string	1.0.0 to 4.4.2
imf.mime_version	MIME-Version	Character string	1.0.0 to 4.4.2
imf.original_encoded_information_types	Original-Encoded-Information-Types	Character string	1.0.0 to 4.4.2
imf.originator_return_address	Originator-Return-Address	Character string	1.0.0 to 4.4.2
imf.precedence	Precedence	Character string	4.0.0 to 4.4.2
imf.priority	Priority	Character string	1.0.0 to 4.4.2
imf.received	Received	Character string	1.0.0 to 4.4.2
imf.references	References	Character string	1.0.0 to 4.4.2
imf.reply_by	Reply-By	Character string	1.0.0 to 4.4.2
imf.reply_to	Reply-To	Character string	1.0.0 to 4.4.2
imf.resent.bcc	Resent-Bcc	Character string	1.0.0 to 4.4.2
imf.resent.cc	Resent-Cc	Character string	1.0.0 to 4.4.2
imf.resent.date	Resent-Date	Character string	1.0.0 to 4.4.2
imf.resent.from	Resent-From	Character string	1.0.0 to 4.4.2
imf.resent.message_id	Resent-Message-ID	Character string	1.0.0 to 4.4.2
imf.resent.sender	Resent-Sender	Character string	1.0.0 to 4.4.2
imf.resent.to	Resent-To	Character string	1.0.0 to 4.4.2
imf.return_path	Return-Path	Character string	1.0.0 to 4.4.2
imf.sender	Sender	Character string	1.0.0 to 4.4.2
imf.sensitivity	Sensitivity	Character string	1.0.0 to 4.4.2
imf.siolabel	SIO-Label	Label	1.8.0 to 4.4.2
imf.siolabel.bgcolor	Background Color	Character string	1.8.0 to 4.4.2
imf.siolabel.fgcolor	Foreground Color	Character string	1.8.0 to 4.4.2
imf.siolabel.label	Label	Character string	1.8.0 to 4.4.2
imf.siolabel.marking	Marking	Character string	1.8.0 to 4.4.2
imf.siolabel.type	Type	Character string	1.8.0 to 4.4.2
imf.siolabel.unknown	Unknown parameter	Character string	1.8.0 to 4.4.2
imf.subject	Subject	Character string	1.0.0 to 4.4.2
imf.supersedes	Supersedes	Character string	1.0.0 to 4.4.2
imf.thread-index	Thread-Index	Character string	1.0.0 to 4.4.2
imf.to	To	Character string	1.0.0 to 4.4.2
imf.unknown_param	Unknown parameter	Label	1.12.0 to 4.4.2
imf.user_agent	User-Agent	Character string	1.8.0 to 4.4.2
imf.x400_content_identifier	X400-Content-Identifier	Character string	1.0.0 to 4.4.2
imf.x400_content_type	X400-Content-Type	Character string	1.0.0 to 4.4.2
imf.x400_mts_identifier	X400-MTS-Identifier	Character string	1.0.0 to 4.4.2
imf.x400_originator	X400-Originator	Character string	1.0.0 to 4.4.2
imf.x400_received	X400-Received	Character string	1.0.0 to 4.4.2
imf.x400_recipients	X400-Recipients	Character string	1.0.0 to 4.4.2