diff --git a/src/request/email.spec.ts b/src/request/email.spec.ts
index e4deb0ff..4bcb76d5 100644
--- a/src/request/email.spec.ts
+++ b/src/request/email.spec.ts
@@ -224,6 +224,11 @@ describe('Email()', () => {
       md5: md5('user@fastmail.com'),
       domain: 'user.fastmail.com',
     },
+    {
+      email: 'alias@user.fastmail.ca',
+      md5: md5('user@fastmail.ca'),
+      domain: 'user.fastmail.ca',
+    },
     {
       email: 'foo@bar.example.com',
       md5: md5('foo@bar.example.com'),
@@ -234,6 +239,11 @@ describe('Email()', () => {
       md5: md5('foo@ymail.com'),
       domain: 'ymail.com',
     },
+    {
+      email: 'test-alias@myyahoo.com',
+      md5: md5('test@myyahoo.com'),
+      domain: 'myyahoo.com',
+    },
     {
       email: 'foo@example.com.com',
       md5: md5('foo@example.com'),
diff --git a/src/request/email.ts b/src/request/email.ts
index dee71a4f..0f28ca1e 100644
--- a/src/request/email.ts
+++ b/src/request/email.ts
@@ -168,6 +168,7 @@ export default class Email implements EmailProps {
     'fastemailer.com': true,
     'fastest.cc': true,
     'fastimap.com': true,
+    'fastmail.ca': true,
     'fastmail.cn': true,
     'fastmail.co.uk': true,
     'fastmail.com': true,
@@ -261,6 +262,7 @@ export default class Email implements EmailProps {
   };
 
   private static readonly yahooDomains: { [key: string]: boolean } = {
+    'myyahoo.com': true,
     'y7mail.com': true,
     'yahoo.at': true,
     'yahoo.be': true,