Systems and methods for email journaling
A computer-implemented method for email journaling may include (1) maintaining, by a journaling mail server, a cache that associates together an update sequence number that indicates a version of an email distribution list and email addresses that are both designated as targets for journaling and included within the version of the email distribution list identified by the update sequence number, (2) receiving, by the server, an email that includes, within at least one header field, a candidate update sequence number and an email distribution list identifier, (3) determining that the update sequence number in the cache is a match for the candidate update sequence number in the header field, and (4) identifying, based on the match between the update sequence number and the candidate update sequence number, the email addresses specified in the cache as the targets for journaling. Various other methods, systems, and computer-readable media are also disclosed.
1. A computer-implemented method for email journaling, at least a portion of the method being performed by a computing device comprising at least one processor, the method comprising:
maintaining, by a journaling mail server, a cache that associates together:
an update sequence number that indicates a version of an email distribution list;
email addresses that are both designated as targets for journaling and included within the version of the email distribution list identified by the update sequence number;
receiving, by the journaling mail server, an email that includes, within at least one header field, a candidate update sequence number and an email distribution list identifier, the email distribution list identifier identifying the email distribution list;
determining that the update sequence number in the cache is a match for the candidate update sequence number in the header field;
identifying, based on the match between the update sequence number and the candidate update sequence number, the email addresses specified in the cache as the targets for journaling.
2. The method of claim 1 , wherein the journaling mail server executes a task according to the simple mail transfer protocol.
3. The method of claim 1 , wherein identifying the email addresses specified in the cache as the targets for journaling enables the journaling mail server to skip a process for matching email addresses that are designated as targets to email addresses that are included within an expanded list of email addresses for the email distribution list.
4. The method of claim 3 , wherein skipping the process for matching email addresses that are designated as targets to email addresses that are included within the expanded list of email addresses for the email distribution list comprises reusing cached results from a previous execution of the process for matching.
5. The method of claim 1 , wherein determining that the update sequence number in the cache is a match for the candidate update sequence number in the header field is performed in response to checking for whether the update sequence number in the cache is a match for the candidate update sequence number in the header field.
6. The method of claim 1 , wherein:
the email is formatted according to a protocol that provides for extensible header fields;
the email includes the candidate update sequence number and the email distribution list identifier within at least one extensible header field according to the protocol.
7. The method of claim 1 , further comprising receiving, by the journaling mail server, an additional email that includes an additional candidate update sequence number and the email distribution list identifier in a header field.
8. The method of claim 7 , further comprising determining that the update sequence number in the cache is not a match for the additional candidate update sequence number in the header field.
9. The method of claim 8 , further comprising, in response to determining that the update sequence number in the cache is not a match, performing a process for matching email addresses that are designated as targets to email addresses that are included within an expanded list of email addresses for the email distribution list.
10. The method of claim 9 , further comprising:
updating the update sequence number in the cache to match the candidate update sequence number in the header field;
updating the email addresses in the cache to specify results of performing the process for matching email addresses.
11. A system for email journaling, the system comprising:
a maintenance module, stored in memory, that maintains, as part of a journaling mail server, a cache that associates together:
an update sequence number that indicates a version of an email distribution list;
email addresses that are both designated as targets for journaling and included within the version of the email distribution list identified by the update sequence number;
a reception module, stored in memory, that receives, as part of the journaling mail server, an email that includes, within at least one header field, a candidate update sequence number and an email distribution list identifier, the email distribution list identifier identifying the email distribution list;
a determination module, stored in memory, that determines that the update sequence number in the cache is a match for the candidate update sequence number in the header field;
an identification module, stored in memory, that identifies, based on the match between the update sequence number and the candidate update sequence number, the email addresses specified in the cache as the targets for journaling;
at least one physical processor configured to execute the maintenance module, the reception module, the determination module, and the identification module.
12. The system of claim 11 , wherein the journaling mail server executes a task according to the simple mail transfer protocol.
13. The system of claim 11 , wherein the identification module identifies the email addresses specified in the cache as the targets for journaling at least in part by enabling the journaling mail server to skip a process for matching email addresses that are designated as targets to email addresses that are included within an expanded list of email addresses for the email distribution list.
14. The system of claim 13 , wherein the identification module skips the process for matching email addresses that are designated as targets to email addresses that are included within the expanded list of email addresses for the email distribution list by reusing cached results from a previous execution of the process for matching.
15. The system of claim 11 , wherein the determination module determines that the update sequence number in the cache is a match for the candidate update sequence number in the header field in response to checking for whether the update sequence number in the cache is a match for the candidate update sequence number in the header field.
16. The system of claim 11 , wherein:
the email is formatted according to a protocol that provides for extensible header fields;
the email includes the candidate update sequence number and the email distribution list identifier within at least one extensible header field according to the protocol.
17. The system of claim 11 , wherein the reception module receives, as part of the journaling mail server, an additional email that includes an additional candidate update sequence number and the email distribution list identifier in a header field.
18. The system of claim 17 , wherein the determination module determines that the update sequence number in the cache is not a match for the additional candidate update sequence number in the header field.
19. The system of claim 18 , wherein the identification module, in response to determining that the update sequence number in the cache is not a match, performs a process for matching email addresses that are designated as targets to email addresses that are included within an expanded list of email addresses for the email distribution list.
20. A non-transitory computer-readable medium comprising one or more computer-readable instructions that, when executed by at least one processor of a computing device, cause the computing device to:
maintain, by a journaling mail server, a cache that associates together:
an update sequence number that indicates a version of an email distribution list;
email addresses that are both designated as targets for journaling and included within the version of the email distribution list identified by the update sequence number;
receive, by the journaling mail server, an email that includes, within at least one header field, a candidate update sequence number and an email distribution list identifier, the email distribution list identifier identifying the email distribution list;
determine that the update sequence number in the cache is a match for the candidate update sequence number in the header field;
identify, based on the match between the update sequence number and the candidate update sequence number, the email addresses specified in the cache as the targets for journaling.