# SpamBlocker > Email spam filtering and management tool using machine learning and rules. (iPhone/iPad app by Seimitsusakufu LLC.) - Source: https://appshunter.io/ios/app/spamblocker/id570617592 (this page in markdown: same URL + `.md`) - Developer: [Seimitsusakufu LLC](https://appshunter.io/developer/459361672) - Category: Productivity, Utilities - Price: Free with in-app purchases - Rating: 2.80/5 from 6 App Store ratings · 36 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 7 MB - Languages: American English, Japanese - Released: 2012-11-13 - Data updated: 2026-06-25 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/spamblocker/id570617592/reviews.md ## What is SpamBlocker? ■SpamBlocker supports Spam/Trash mailbox’s reassignment. Some (IMAP) mail servers support a machine learning spam filtering by using the mail data in the spam mailbox. If the spam mailbox matches between SpamBlocker and the mail server, SpamBlocker can feedback its spam filtering result to the mail server. Then the spam mail traffic can be reduced. ■SpamBlocker provides a spam filtering feature SpamBlocker(the usage is explained at the online help in the App) can filter out spams(junk mails) from the incoming mail messages by a spam filter which is generated by the SpamBlocker's built-in machine learning engine. SpamBlocker also supports 'rule based' filtering by specifying "sender's mail address" or "subject"'s substring.
 SpamBlocker supports IMAP/POP3 and can access only Inbox, spam box, trash box. SpamBlocker has no mail sending facility. As for the POP3 mail filtering, SpamBlocker has to get started before other mailers, otherwise spams will be downloaded to other mailers because POP3 has no synchronization mechanism . SpamBlocker supports HTML image blocking. SMS/MMS are not supported. SpamBlocker adapts the advertising free application model, but it has no resident toolbar, so the client area with an advertisement banner isn't narrower than other standard iOS applications. 
■Main Features: •Fast machine learning engine optimized for a mobile device ◦Learn ham and spam mail messages to generate a spam filter ◦Spam filtering time is very short compared with mail messages downloading time. ◦Multi-language. In this version, only English and Japanese are supported. 
European languages will be OK if it's based on alphabets. ◦Multi-account ■How to connect to an mail server: To connect an mail server, just specify your full email address as your login name(username) and the password you log in to your account. If you don't know your login name/password, contact an organization or personnel in charge of the mail server to get a hostname, user id(name), password. ■Basic operation * Pull down to Refresh/Long Press to reload&spam filtering * Push up to download older mails at the bottom of message lists * Tap/Swipe the navigation bar to move around mailboxes * Move/Delete/Mark mail messages by the toolbar on the navigation bar * Tap/Swipe the navigation bar to turn over mail messages * Swipe To POP3 server to move back a mail to POP3 server. * Add a mail to the blacklist/spam learning data by swiping a cell ■Spam filtering: SpamBlocker generates a spam filter by learning from spam and ham messages in INBOX. Just follow the steps, you can have your own spam filter. 1. Tap 'Edit' button in Monitor. 2. Pick up several mail messages by tapping each table cell. 3. Tap "SPAM" button on the command bar. 4. Likewise pick up mails, and "HAM" button on the command bar. 5. "Pull down to Refresh" or "Long press on the navigation bar" triggers Machine learning, then a spam filter will be generated. 6. Repeat the steps(1-5) until the number of spams and hams reaches about 16. 7. After learning 16 spams and 16 hams, SpamBlocker is ready to start judging which mail is spam or not. Set the spam filter switch on the account setting if you want to start the spamfiltering. 8. Check the filtering result on Monitor. 9. Correct errors and 'Pull down to Refresh" or "Long press on the navigation bar", re-learning starts and your spam filter gets smarter. Repeat the steps(8-9) until no errors are found. ■Spam Rule Filtering: Please don't forget about turning on "Spam Rule switch" at the account setting after setting rules. ■Other usage: Please visit support page. http://www.seimitsusakufu.com/iOS/mailapps/en/support.html. ■Support: To get a further support , contact through the following mail address. support_seimitsu@jcom.home.ne.jp ■Copyright: Some of icons in this software are designed by Icons8 (http://icons8.com) ## Key features - Spam/Trash mailbox reassignment - Machine learning spam filtering - Rule-based filtering (sender, subject) - IMAP/POP3 support - HTML image blocking - Multi-account support ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ad&Limitation | $0.99 | one-time | ## Recent user reviews (10 of 36) All indexed reviews: https://appshunter.io/ios/app/spamblocker/id570617592/reviews.md ### 5/5 — Spam Blocker *2020-01-20, version 1.7.4* I was getting 80 to 100 spam emails per day and could not get them to stop. I blocked them, unsubscribed, and marked them as phishing. Nothing worked until i got this product set up. I took about 3 days of learning and now i get NO spam. Incredible! You need to enter the IMAP address of the mail server you are using to start it up. Then you choose monitor, mark all the bad emails as spam, and select learn from the monitor. After a few days the spam starts going to your deleted folder. What a relief! ### 4/5 — Adios Spam *2018-02-11, version 1.6.16* We installed this on my iPad, because I was getting upwards of 80 JUNK spam emails daily. It took several weeks to "educate the program" to know which ones were JUNK and which emails were ones I wanted. But, now that I have it is working wonderfully. It was a bit daunting before we "educated the program", but is definitely worth the effort, and Rewards are paying off with NO MORE SPAM! I love it. Great Application. ### 1/5 — Terrible *2017-07-03, version 1.6.10* The app crashed and I couldn't use at all. I wouldn't recommend it AT ALL! ### 1/5 — I don't see that it helps *2016-12-29, version 1.6.5* I have had the app for two weeks now and haven't seen a reduction of spam in my inbox despite spending 30 minutes everyday updating the spam senders list. Removed the app. To much work for too little results. ### 1/5 — Joke *2016-05-18, version 1.5.6* Try making a app that actually works!!! Or even opens for that matter. Don't waste your time with this ### 1/5 — Too Much BS *2016-04-22, version 1.5.5* Thought I'd try it. Couldn't figure out if it connected to my email server. Kept sending me to their website with no explanation. What it seems to be is an ongoing service that charges a monthly rate after your free month. Too coy for me. Guys just be up front with what your are about w/o jacking someone around. I just want a simple spam blocker which exists in OS 10 but not in ios9. I don't even use Mail in my iPhone because of spam problem. ### 1/5 — Not even worth the 1 star rating! *2016-02-02, version 1.5.2* Thank god it was free,'cause this app does not work at all. No matter how hard I tried, I couldn't get it configured. It should be WAY easier to set up and I'll bet that I'm not the only one who thinks so.👎🏻👎🏻👎🏻👎🏻👎🏻 ### 1/5 — Zero *2015-09-24, version 1.4.12* Useless... ### 1/5 — Instructions *2015-06-17, version 1.4.12* There are no clear instructions for app, could do with a tutorial page for set up instead of launching straight into it. I don't actually know if I'm doing things right, or accepting spam as correct email, or hiding email I want to keep! ### 2/5 — Instructions are confusing *2015-05-08, version 1.4.12* 10 plus pages of instructions with terms I have never heard of, illustrates a programmer wrote them. Make sense to programmers but little sense to users . It looks to be efficient...getting it to auto identify spam and remove them...is not efficient. ## Frequently asked questions about SpamBlocker ### Does SpamBlocker have ads? SpamBlocker is an advertising-free application. It does not display any advertisements within its interface. ### How often is SpamBlocker updated? The latest version, 1.8.0, was last updated on 2025-11-24. This indicates a recent update, suggesting the app is actively maintained. ### What devices does SpamBlocker support? SpamBlocker is available for both iPhone and iPad devices, offering compatibility across Apple's mobile platforms. ### What is the age rating for SpamBlocker? SpamBlocker has an age rating of 4+, making it suitable for a wide range of users. ### How does SpamBlocker's machine learning work? SpamBlocker learns from your ham (legitimate) and spam mail messages to generate a personalized spam filter. This process is optimized for mobile devices and is very fast. ### Can SpamBlocker send emails? No, SpamBlocker does not have any mail sending facilities. Its sole purpose is to filter and manage incoming emails. ### What email protocols does SpamBlocker support? SpamBlocker supports both IMAP and POP3 protocols. It can access only the Inbox, spam box, and trash box folders. ### What do users think of SpamBlocker? Based on available data, SpamBlocker has a rating of 2.8 stars from 6 ratings. This suggests a mixed user reception. ## Version history (last 5 releases) ### 1.8.0 — 2025-11-24 Corrections are made to ensure compatibility with iOS 26. ### 1.7.8 — 2022-09-15 *Improvement & bug fix 1. Measures to cope with iO16 Bug fixes to be expected under iOS16 2. iPhone notch support, until now the screen has been cut off in portrait mode. ### 1.7.7 — 2021-09-19 *Compatible with iOS15 *Bug fixes 1. Once it crashes, the app will not launch again 2. When rule filtering is enabled, receiving mail might cause an infinite loop. 3. Flag processing when receiving mail might not be handled correctly. 4. Some icons are not displayed in dark mode. ### 1.7.6 — 2021-03-31 Improvement 1.Improved error handling when account reconnection fails. Bug fixes 1. In some cases, fails to parse an email and crashes 2. Occasionally fails to display the subject of a mail 3. Occasionally crash on message download for multiple accounts. 4. Other bugs ### 1.7.5 — 2020-09-22 * some of snap shots in the online help are not latest. Improvement 1. Measures to cope with iO14 Bug fixes to be expected under iOS14 Bug fixes 1. Snippets might not be displayed with some mails 2. Fail to parse an email with a certain multipart form. Others、the following features are suspended because of its instability. 1. Learning&Rule data sharing through iCloud 2. Section display in the mail list screen 3. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*