Schema for Gmail logs in BigQuery

event_info.client_context.client_type

Logged event type. The event type corresponds to the Event attribute in Gmail log events in Security Investigation Tool. Possible values are:

0: Unknown mail event type

1: Message sent

2: Message received

3: A Gmail user manually applied a spam classification to the message. For example, the user marked the message as spam, phishing, or not spam.

4: Gmail flagged the message as spam after delivery. Several factors can cause this, including poor sender reputation or new virus hashes.

5: Message quarantined

6: Message released from quarantine

7: Message opened for the first time

8: Message marked as unread

9: Message replied to for the first time

10: Message forwarded for the first time

11: Message autoforwarded with a Gmail account forwarding setting

12: Message moved to Inbox

13: Message moved to Trash

14: Message removed from Trash

15: Link in message body was clicked

16: Link in message attachment link was clicked during attachment preview

17: One or more message attachments were downloaded

18: One or more message attachments saved to Google Drive

19: One or more Google Drive items in the message were saved to the recipient's Google Drive

20: Classification label applied to message

21: Message classification label change

22: Classification label removed from message

23: Classification label applied to all message attachments

24: Classification label changed on all message attachments

25: Classification label removed from all message attachments

26: Message archived

27: Message permanently deleted

28: One or more message attachments previewed

29: Message saved as draft

30: Message couldn't be delivered, and bounced

31: Message viewed, including first and following readings. For details on a known iOS issue, go to Google Workspace known issues.  

32: Message downloaded

Note: BiqQuery exports enabled between April 2024 and July 2024 don’t include historical View events between April 2024 and the date you enabled the export. BigQuery exports enabled in August 2024 and later include historical View events 6 months prior to the date you enabled the export.

True if the event was successful, otherwise false. For example, the value is false if the message was rejected by a policy.

The message delivery action that the event represents. Possible values:

1: Message received by inbound SMTP server

2: Message accepted by Gmail and prepared for delivery. This step usually follows 1, or is the first step if you send from Gmail. For incoming messages, policies with reject dispositions are typically evaluated here. For example, an attachment compliance policy that rejects incoming messages.

3: Gmail acted on the message. For example, delivered to a Gmail mailbox or sent to another server. This step usually follows 2. Policies with dispositions other than reject are evaluated here. For example, an attachment compliance policy that strips attachments based on file type or other criteria.

10: Message sent out by outbound SMTP server

14: A temporary error occurred when Gmail tried to deliver the message, and the message has been scheduled for retry. Typically, this is caused by external or internal servers that are temporarily unavailable. Retry later. For example, Gmail tried to deliver the message to an external SMTP server, but received temporary error.

18: Message could not be delivered and bounced. Sometimes you can find out what happened by reading message_info.description. Common reasons include:

• The recipient server didn’t accept the request

• The message could not be delivered because of too many temporary errors (go to 14 in this table)

• The message was rejected because of a deferred policy evaluation

• The recipient is unrecognized and there’s no policy triggered to change the primary delivery route

19: Message was dropped by Gmail. Common reasons include:

• If a sent message triggers admin quarantine consequences, the original message is dropped and a copy of the message is added to the Admin Quarantine

• For a journaling message, the wrapped inner message is delivered but the original message is dropped

• For inbound messages, Gmail can block and drop messages if, for example:

  • The message is not compliant with RFC 5322

  • The sender violates bulk senders guidelines

• If a policy removed the primary delivery route and added other routes, the original message is dropped and copies are delivered to the added routes

• If the recipient is an unrecognized address and there’s a policy that adds additional routes, the original message is dropped and copies are delivered to the added routes

45: Message was accepted for delivery by the Google Groups subsystem

46: Message's recipient address was a Google Group, and the recipient was expanded to each member of the Google Group that has message delivery enabled

48: Message received by inbound SMTP server for relay

49: Message sent through relay by outbound SMTP server

51: Message was written to Google Groups storage

54: Message was rejected by the Google Groups storage system

55: Message was re-inserted into Gmail by policies that modify the primary delivery route or envelope recipient

68: Message accepted by Gmail and prepared for delivery. This is similar to 2, but the message was sent through a Gmail server.

69: A user changed the message’s spam classification in Gmail. For example, a user marked it as spam, phishing, or not spam.

70: The message was reclassified as spam or phishing after it was delivered to Gmail.

71: A user took an action in the inbox after receiving the message. Post-delivery actions include opening a message, clicking a link in a message, and downloading an attachment. BigQuery export includes details about the action

Information about the message’s attachments. This record is repeated for every attachment.

Malware category, if detected when the message is handled. This field is unset if no malware is detected. Possible values:

• 1: A known malicious program type of malware
• 2: A virus or worm type of malware
• 3: Possible harmful email content
• 4: Possible unwanted email content
• 5: Other type of malware

Message authentication type (for example, SPF, DKIM). Possible values:

• 1: SPF
• 2: DKIM
• 3: DKIM_PROXY
• 4: XOAR_SPF
• 5: XOAR_DKIM
• 6: ARC_SPF
• 7: ARC_DKIM

SMTP reply code for inbound and outbound SMTP connections. Usually 2xx, 4xx, or 5xx.

Detailed reason for the SMTP reply code for inbound connections. Possible values:

• 1: Default reason messages are accepted or rejected
• 3: Malware
• 4: DMARC policy
• 5: Attachment not supported by Gmail
• 6: Receive limit exceede
• 7: Account over quote
• 8: Bad PTR report
• 9: Recipient doesn't exist
• 10: Customer policy
• 12: RFC violation
• 13: Blatant spam
• 14: Denial of service
• 15: Malicious or spam links
• 16: Low IP reputation
• 17: Low domain repuation
• 18: IP address listed in public real-time block list
• 19: Temporarily rejected due to DOS limits
• 20: Permanently rejected due to DOS limits

Type of connection made to the SMTP server. Only set for logs of events that explicitly handle SMTP connections. Values:

• 0: Not TLS
• 1: TLS

message_connection_info.smtp_user_agent_ip 

message_info.destination.rcpt_response

Subcategory for each service. Go to message_info.destination.service for value definitions.

The service at the message destination. There are many service and selector pairs for destinations. You can use these two fields to determine which service the message was sent to.

For inbound messages only. When set, indicates that S/MIME decryption was attempted for this recipient.The value indicates the completion status. Not set if skipped.

For inbound messages only. When set, indicates that S/MIME extraction was attempted for this recipient. The value indicates the completion status. Not set if skipped.

For inbound messages only. When set, indicates that S/MIME parsing was attempted for this recipient. The value indicates the completion status. Not set if skipped.

For inbound messages only. When set, indicates that S/MIME signature verification was attempted for this recipient. The value indicates the completion status. Not set if skipped.

String that has information of all recipient information flattened, in this format:
“service_for_recipient1:selector_for_recipient1:address_for_recipient1,
service_for_recipient2:selector_for_recipient2:address_for_recipient2”

True if the policy rules were evaluated for the sender (the message was processed for outbound delivery). False if the policy rules were evaluated for the recipient (the message was processed for inbound delivery).

Message set type that the message belongs to. Go to message_info.message_set.type for more information.

Message set types are attributes that describe the message. For example, if the message was inbound, outbound, or internal. Possible values:

1: Message is inbound (received from outside your domains). This message set doesn’t appear with message set 10.

2: Message is outbound (sent to a recipient outside your domains). This message set doesn’t appear with message set 10.

4: Message contains objectionable content, as defined by one of your policies

6: Message triggered the walled garden rule you configured that restricts messages to authorized addresses or domains

7: Gmail classified the message as spam

8: Message being sent (outgoing message)

9: Message being received (incoming message)

10: Message that is internal to your domains

11: Message has a sender or recipients outside your domains. For received messages: If message set 27 is missing, the sender couldn't be authenticated. The message is treated as having a sender outside your domain.

12: Message has some recipients inside your domain and some recipients outside your domain. This message set might appear when:

• There are multiple recipients
• A message is being sent. For messages being received, recipients must all belong to the same domain
• Action type for the message is 2. Multi-recipient messages are split out into single-recipient messages

13: The type of the message set is unknown

15: The policy being checked against is tied to a Gmail user

18: Message doesn’t have a default route

19: The address list you configured for domain default routing matches the correspondent of the message

20: Message is from an address in your blocked senders list

21: Message was sent over TLS and the SSL certificate is valid.

22: Message was sent over TLS

24: The recipient of this message is unknown

25: Message is a non-delivery report responding to a message that was not delivered

26: Message triggered a rerouting rule, which you configured in domain default routing

27:  Sender successfully passed SPF/DKIM/DMARC authentication. If the sender isn’t authenticated, the sender domain is untrusted and the message is not considered internal.

28: Exchange journal is archiving the message to Google Vault

29: Message was routed through SMTP relay

30: A recipient of the message matched one of the enumerated recipients (instead of a regular expression pattern) you configured for domain routing, or domain default routing

31: Message matched a domain default routing condition you configured

32: Message was created from an Exchange journal message for archiving to Google Vault.

33: Message has to be transmitted through a secure connection, such as TLS

34: The policy being checked against is tied to a group instead of an individual Gmail user

35: Message could not be authenticated in SMTP relay because it has an empty SMTP envelope-from address or is possibly an Exchange Journal message. It will be checked later at SMTP RCPT command time.

36: Message has aggressive spam filtering enabled

37: Message is authenticated for SMTP relay

39: Sender is from an authenticated domain for relay

40: Message is from a Google Workspace user in the domain being authenticated for relay

41: Sender has successfully authenticated with SMTP AUTH, and Gmail is trying to authenticate SMTP relay for the sender's domain

42: Message was sent from an address that isn’t authenticated

43: Message was rerouted through an alias table

44: Message triggered a rule that changes the route of the mail flow

45: Message is to a catch-all account and is being relayed to an on-premise server. System-of-record policies won't be applied to it.

46: Message bypassed the spam filter

47: Message was detected to be spam by tag-and-deliver information in the inbound gateway settings

48: Message was not checked for spam (by SMTP) due to a spam-override policy

49: Always override spam rejection for the message

50: Message matches a domain routing condition you configured

51: Message triggered a rerouting rule that you configured for domain routing

55: Message was created by the Exchange Journal generation setting

57: Message was received from an inbound gateway rule that you configured

60: Message is protected with Gmail confidential mode

61: Message was received by Security sandbox

62: The address list you configured for domain default routing matches the SMTP envelope recipient instead of the correspondent of the message

63: Message triggered a domain-level rerouting rule, which you configured for domain routing, or domain default routing

Post-delivery action type. Possible values:

1: Message opened for the first time

2: Message marked as unread

3: Message replied

4: Message forwarded

5: Message auto-forwarded by a Gmail setting

6: Message moved to inbox

7:  Message moved to trash

8: Message moved out of trash

9: A link in the message body was clicked

10: One or more message attachments were downloaded

11: A link in an attachment was clicked when the attachment was previewed

12: One or more message attachments were saved to Google Drive

13: A link in the add-on was clicked

14: One or more Google Drive items in the message were downloaded

15: One or more Google Drive items in the message were saved to the recipient's Google Drive

16: A classification label was applied to or changed for the message

17: A classification label was applied to or changed for message attachments

18: Message archived

19: Message permanently deleted

20: One or more message attachments were previewed

21: Eecipient blocked the message sender

22: Message saved as draft

23: Message viewed, including first and following readings

24: Message downloaded

Malware type, if malware is detected during message handling. If no malware is detected, this field is not set. Possible values:

1: Known malicious program type of malware

2: Virus or worm type of malware

3: Possible harmful message content

4:  Possible unwanted message content

5: Other type of malware

Entity type that was classified. Possible values:

1: Message body

2: Attachment

Classification event type. Possible values:

1: Label changed

2: Label newly applied

3: Label removed

The top-level S/MIME type of a message, indicated by the Content-Type: header. Possible values:

0: Message does not have a recognized S/MIME Content-Type

1: An S/MIME message with a detached signature, indicated by content type multipart/signed with parameter protocol=application/pkcs7-signature

2: An S/MIME message with an opaque signature, indicated by content type application/pkcs7-mime or application/x-pkcs7-mime with parameter smime-type=signed-data

3: An S/MIME message that is encrypted, indicated by content type application/pkcs7-mime or application/x-pkcs7-mime with parameter smime-type=enveloped-data

4: An S/MIME message that is compressed, indicated by content type application/pkcs7-mime or application/x-pkcs7-mime with parameter smime-type=compressed-data

For outbound messages only. When set and true, indicates the message should be encrypted.

When set, indicates that inbound S/MIME processing occurred. Not set if skipped. The value indicates the completion status. Note: Currently not set.

For outbound messages only. When set, indicates that S/MIME packaging was attempted. Not set if skipped. The value indicates the completion status.

If Gmail rejects an SMTP relay request, this error code provides information about the cause of the rejection. Possible values:

1: Authentication error

2: Daily rate limit exceeded

3: Peak rate limit exceeded

4: Abuse of SMTP relay

5: Per-user rate limit exceeded

From: header display name as it appears in the message headers, for example, John Doe. This field might be truncated if the log is too long or if there are too many triggered rules (triggered_rule_info) in the log.

A subcategory of the source server. For value descriptions, go to message_info.source.service.

The source service for the message. Use these two fields to determine which service sent the message and why the message was generated.

Reason the message was classified as spam, phishing, or other classification. Possible values:

1: Default spam classification reason

2: Message classified because of sender's past actions 

3: Suspicious content

4: Suspicious link

5: Suspicious attachment

6: Custom policy defined in Google Workspace Gmail settings

7: DMARC

8: Domain in public RBLs

9: RFC standards violation

10: Gmail policy violation

11: Machine learning verdict

12: Sender reputation

13: Blatant spam

14: Advanced phishing and malware protection

The outcome of the Gmail spam classification. Possible values:

1: Not spam or malware

2: Spam

3: Phishing

4: Suspicious

5: Malware

MIME type category. Possible values:

1: Unrecognized file type

2: Microsoft Office documents, including word processing, spreadsheet, presentation, and database documents. Includes PDF files. The file might or might not be encrypted.

3: Video and multimedia, for example, MPEG, Quicktime, or WMV

4: Music and audio, for example,  MP3, AAC, and WAV

5: Images, for example, JPEG, BMP, or GIF

6: Archives, for example, ZIP, TAR,  or TGZ

7: Executables, for example EXE, COM, or JS

8: Encryped Office documents

9: Office documents that aren't encrypted

Action taken for the consequence. Possible values:

0: Consequence is a no-op

3: Put message in Admin Quarantine

4: Modify the primary delivery target

5: Add a delivery target

6: Added a message header

7: Overwrite the envelope recipient

9: Add message to specified message set

10: Modify the message labels

11: Prefix text to message subject

12: Add a footer to the message

13: Strip the message body

14: Store a copy of the message in the user’s mailbox, according to comprehensive mail storage setting

15: Replace attachment with canned text

16: Require secure message delivery

17: Message can’t be delivered and bounced

18: Archive to Google Vault for recipients

20: Encrypt outbound message using S/MIME

21: Change the recipient user when message is received at SMTP

Custom rule type. Possible values:

0: Walled garden

7: Objectionable content

8: Content compliance

10: Received mail routing

11: Sent mail routing

12: Spam override

14: Blocked senders

15: Append footer

16: Attachment compliance

17: TLS compliance

18: Domain default routing

19: Inbound email journal acceptance in Vault

20: Outbound relay

21: Quarantine summary

22: Alternate secure route

23: Alias table

24: Comprehensive mail storage

25: Routing rule

26: Inbound gateway

27: S/MIME

28: Third-party email archiving

Describes the custom rule spam classification results. Possible values:

0: No action—The rule honored the Gmail spam classification outcome

1: Spam—The rule classified the message as spam

2: Not spam—the rule classified the message as not spam

Name of the attachment where a matching string was found in the text extracted from a binary file. Note: This field is currently not populated.

Match expression set in the Admin console. This field may be truncated if the log is too long, or the number of triggered rules (triggered_rule_info) in the log is too big.

String that triggered the rule. Sensitive information is hidden by * or . This field might be truncated if the log is too long, or the number of triggered rules (triggered_rule_info) in the log is too large.

Location of the string matched in the message. Possible values:

0: Unknown

1: Message body, including text format attachments

2: Binary format attachments

3: Message headers

4: Subject

5: Sender header

6: Recipient header

7: Raw message

Type of match. Possible values:

• 0: Undefined
• 1: Regular expression match
• 2: Predefined detector match
• 3: Simple content match
• 4: Non-ASCII match

Error encountered while uploading the message to the destination. Possible values:

• 0: Uncategorized transient error
• 1: Recipient account is too busy
• 2: DNS error resolving recipient domain
• 3: Recipient’s server refused connection
• 4: Recipient is out of storage