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178 lines
6.3 KiB
Markdown
178 lines
6.3 KiB
Markdown
List of disposable email domains
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========================
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[](https://creativecommons.org/publicdomain/zero/1.0/)
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This repo contains a [list of disposable and temporary email address domains](disposable_email_blocklist.conf) often used to register dummy users in order to spam or abuse some services.
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We cannot guarantee all of these can still be considered disposable but we do basic checking so chances are they were disposable at one point in time.
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Allowlist
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=========
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The file [allowlist.conf](allowlist.conf) gathers email domains that are often identified as disposable but in fact are not.
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Contributing
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============
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Feel free to create PR with additions or request removal of some domain (with reasons).
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**Specifically, please cite in your PR where one can generate a disposable email address which uses that domain, so the maintainers can verify it.**
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Please add new disposable domains directly into [disposable_email_blocklist.conf](disposable_email_blocklist.conf) in the same format (only second level domains on new line without @), then run [maintain.sh](maintain.sh). The shell script will help you convert uppercase to lowercase, sort, remove duplicates and remove allowlisted domains.
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Changelog
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============
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* 2/11/21 We created a github [org account](https://github.com/disposable-email-domains) and transferred the repository to it.
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* 4/18/19 [@di](https://github.com/di) [joined](https://github.com/martenson/disposable-email-domains/issues/205) as a core maintainer of this project. Thank you!
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* 7/31/17 [@deguif](https://github.com/deguif) [joined](https://github.com/martenson/disposable-email-domains/issues/106) as a core maintainer of this project. Thanks!
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* 12/6/16 - Available as [PyPI module](https://pypi.org/project/disposable-email-domains) thanks to [@di](https://github.com/di)
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* 7/27/16 - Converted all domains to the second level. This means that starting from [this commit](https://github.com/martenson/disposable-email-domains/commit/61ae67aacdab0b19098de2e13069d7c35b74017a) the implementers should take care of matching the second level domain names properly i.e. `@xxx.yyy.zzz` should match `yyy.zzz` in blocklist more info in [#46](https://github.com/martenson/disposable-email-domains/issues/46)
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Example Usage
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=============
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TOC: [Python](#python), [PHP](#php), [Go](#go), [Ruby on Rails](#ruby-on-rails), [NodeJS](#nodejs), [C#](#c)
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### Python
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```Python
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with open('disposable_email_blocklist.conf') as blocklist:
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blocklist_content = {line.rstrip() for line in blocklist.readlines()}
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if email.partition('@')[2] in blocklist_content:
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message = "Please enter your permanent email address."
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return (False, message)
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else:
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return True
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```
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Available as [PyPI module](https://pypi.org/project/disposable-email-domains) thanks to [@di](https://github.com/di)
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```python
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>>> from disposable_email_domains import blocklist
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>>> 'bearsarefuzzy.com' in blocklist
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True
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```
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### PHP
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contributed by [@txt3rob](https://github.com/txt3rob), [@deguif](https://github.com/deguif), [@pjebs](https://github.com/pjebs) and [@Wruczek](https://github.com/Wruczek)
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1. Make sure the passed email is valid. You can check that with [filter_var](https://secure.php.net/manual/en/function.filter-var.php)
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2. Make sure you have the mbstring extension installed on your server
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```php
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function isDisposableEmail($email, $blocklist_path = null) {
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if (!$blocklist_path) $blocklist_path = __DIR__ . '/disposable_email_blocklist.conf';
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$disposable_domains = file($blocklist_path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
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$domain = mb_strtolower(explode('@', trim($email))[1]);
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return in_array($domain, $disposable_domains);
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}
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```
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Alternatively check out Composer package https://github.com/elliotjreed/disposable-emails-filter-php.
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### Go
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contributed by [@pjebs](https://github.com/pjebs)
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```go
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import ("bufio"; "os"; "strings";)
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var disposableList = make(map[string]struct{}, 3500)
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func init() {
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f, _ := os.Open("disposable_email_blocklist.conf")
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for scanner := bufio.NewScanner(f); scanner.Scan(); {
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disposableList[scanner.Text()] = struct{}{}
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}
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f.Close()
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}
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func isDisposableEmail(email string) (disposable bool) {
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segs := strings.Split(email, "@")
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_, disposable = disposableList[strings.ToLower(segs[len(segs)-1])]
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return
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}
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```
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Alternatively check out Go package https://github.com/rocketlaunchr/anti-disposable-email.
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### Ruby on Rails
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contributed by [@MitsunChieh](https://github.com/MitsunChieh)
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In the resource model, usually it is `user.rb`:
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```Ruby
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before_validation :reject_email_blocklist
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def reject_email_blocklist
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blocklist = File.read('config/disposable_email_blocklist.conf').split("\n")
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if blocklist.include?(email.split('@')[1])
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errors[:email] << 'invalid email'
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return false
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else
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return true
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end
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end
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```
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Alternatively you can use the `disposable_mail` gem: https://github.com/oesgalha/disposable_mail.
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### Node.js
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contributed by [@boywithkeyboard](https://github.com/boywithkeyboard)
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```js
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import { readFile } from 'node:fs/promises'
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let blocklist
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async function isDisposable(email) {
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if (!blocklist) {
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const content = await readFile('disposable_email_blocklist.conf', { encoding: 'utf-8' })
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blocklist = content.split('\r\n').slice(0, -1)
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}
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return blocklist.includes(email.split('@')[1])
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}
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```
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### C#
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```C#
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private static readonly Lazy<HashSet<string>> _emailBlockList = new Lazy<HashSet<string>>(() =>
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{
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var lines = File.ReadLines("disposable_email_blocklist.conf")
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.Where(line => !string.IsNullOrWhiteSpace(line) && !line.TrimStart().StartsWith("//"));
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return new HashSet<string>(lines, StringComparer.OrdinalIgnoreCase);
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});
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private static bool IsBlocklisted(string domain) => _emailBlockList.Value.Contains(domain);
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...
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var addr = new MailAddress(email);
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if (IsBlocklisted(addr.Host)))
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throw new ApplicationException("Email is blocklisted.");
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```
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### Bash
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```
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#!/bin/bash
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# This script checks if an email address is temporary.
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# Read blocklist file into a bash array
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mapfile -t blocklist < disposable_email_blocklist.conf
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# Check if email domain is in blocklist
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if [[ " ${blocklist[@]} " =~ " ${email#*@} " ]]; then
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message="Please enter your permanent email address."
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return_value=false
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else
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return_value=true
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fi
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# Return result
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echo "$return_value"
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```
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