[ https://issues.apache.org/jira/browse/JAMES-3693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17483665#comment-17483665 ]
Benoit Tellier commented on JAMES-3693: --------------------------------------- I added a small video demonstrating the rate limiting feature on top of a Redis server. > Email rate limiting > ------------------- > > Key: JAMES-3693 > URL: https://issues.apache.org/jira/browse/JAMES-3693 > Project: James Server > Issue Type: New Feature > Reporter: Tung TRAN > Priority: Major > Attachments: redis-rate-limit-2022-01-28_16.09.42.mp4 > > Time Spent: 12.5h > Remaining Estimate: 0h > > h3. Why > > Rate limiting is one of the common features. Examples: SaaS is one > [https://www.fastmail.help/hc/en-us/articles/1500000277382-Account-limits#sending/receiving], > [https://support.google.com/mail/answer/22839] > > They limit how many emails you can send/receive from/to each email account > over a given period of time. > We believe the rate-limiting will help James has more control of the resource > and easy to dynamic config the user policy. It also complements the storage > quota. > > h3. How > - Create a new sub maven module for this extension. This extension will be > dropped by default in one James installation (not of a runtime dependency) > - The rate limit will have 2 criteria: number of emails and total size of > emails > - Create 3 mailets: > * PerSenderRateLimit is per sender > * PerRecipientRateLimit is per recipient > * GlobalRateLimit for everyone > > The mailetcontainer configuration will look like: > {code:xml} > > <mailet matcher="All" class="PerSenderRateLimit"> > (<redisURL>...</redisURL> + creds?) > <!-- Appended before the type (count/size) and the sender mail address to > store the current rate in Redis --> > <redisKeyPrefix>xxx</redisKeyPrefix> > <period>1hour</period> > <count>100<count> > <size>1GB</size> > </mailet> > > <mailet matcher="All" class="PerRecipientRateLimit"> > (<redisURL>...</redisURL> + creds?) > <!-- Appended before the type (count/size) and the sender mail address to > store the current rate in Redis --> > <redisKeyPrefix>xxx</redisKeyPrefix> > <period>1hour</period> > <count>100<count> > <size>1GB</size> > </mailet> > > <mailet matcher="All" class="GlobalRateLimit"> > (<redisURL>...</redisURL> + creds?) > <!-- Appended before the type (count/size) and the sender mail address to > store the current rate in Redis --> > <redisKeyPrefix>xxx</redisKeyPrefix> > <period>1hour</period> > <count>100<count> > <recipients>100<recipients> > <size>1GB</size> > <sizeForAllRecipients>5GB</sizeForAllRecipients> > <exceededProcessor>tooMuchMails</exceededProcessor> > </mailet> {code} > > - Create an interface RateLimiter, which will evaluate the current rate limit > and return whether the result is acceptable or exceeded. > - Create the implement InmemoryRateLimiter, which use guava-rate-limiter > - Create a configuration POJO RedisRateLimiterConfiguration(Duration period, > URL redisServerURL). > - Create the implement RedisRateLimiter, which will use Redis to store the > current rate of each email. Use [https://lettuce.io/] for the non-blocking > Redis driver. > - Write the document such as a setup, and provide a mailetcontainer sample > file. > h3. References > - [https://www.baeldung.com/guava-rate-limiter] > - [https://github.com/lettuce-io/lettuce-core#reactive-api] -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: server-dev-unsubscr...@james.apache.org For additional commands, e-mail: server-dev-h...@james.apache.org