diff --git a/src/app/Jobs/PasswordResetEmail.php b/src/app/Jobs/PasswordResetEmail.php
index 87a597ae..f4ff3f50 100644
--- a/src/app/Jobs/PasswordResetEmail.php
+++ b/src/app/Jobs/PasswordResetEmail.php
@@ -1,62 +1,64 @@
 <?php
 
 namespace App\Jobs;
 
 use App\Mail\PasswordReset;
 use App\VerificationCode;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Support\Facades\Mail;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 
 class PasswordResetEmail implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     /** @var int The number of times the job may be attempted. */
     public $tries = 2;
 
     /** @var \App\VerificationCode Verification code object */
     protected $code;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
 
     /**
      * Create a new job instance.
      *
      * @param \App\VerificationCode $code Verification code object
      *
      * @return void
      */
     public function __construct(VerificationCode $code)
     {
         $this->code = $code;
     }
 
     /**
      * Determine the time at which the job should timeout.
      *
      * @return \DateTime
      */
     public function retryUntil()
     {
         // FIXME: I think it does not make sense to continue trying after 1 hour
         return now()->addHours(1);
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         $email = $this->code->user->getSetting('external_email');
 
         Mail::to($email)->send(new PasswordReset($this->code));
     }
 }
diff --git a/src/app/Jobs/ProcessDomainCreate.php b/src/app/Jobs/ProcessDomainCreate.php
index 55fff3b7..ed276756 100644
--- a/src/app/Jobs/ProcessDomainCreate.php
+++ b/src/app/Jobs/ProcessDomainCreate.php
@@ -1,45 +1,48 @@
 <?php
 
 namespace App\Jobs;
 
 use App\Backends\LDAP;
 use App\Domain;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 
 class ProcessDomainCreate implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     protected $domain;
 
     public $tries = 5;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job instance.
      *
      * @param Domain $domain The domain to create.
      *
      * @return void
      */
     public function __construct(Domain $domain)
     {
         $this->domain = $domain;
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         LDAP::createDomain($this->domain);
     }
 }
diff --git a/src/app/Jobs/ProcessUserCreate.php b/src/app/Jobs/ProcessUserCreate.php
index e9b4564a..8d40dc0c 100644
--- a/src/app/Jobs/ProcessUserCreate.php
+++ b/src/app/Jobs/ProcessUserCreate.php
@@ -1,45 +1,49 @@
 <?php
 
 namespace App\Jobs;
 
 use App\Backends\LDAP;
 use App\User;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Queue\SerializesModels;
 
 class ProcessUserCreate implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     protected $user;
 
     public $tries = 5;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
+
     /**
      * Create a new job instance.
      *
      * @param User $user The user to create.
      *
      * @return void
      */
     public function __construct(User $user)
     {
         $this->user = $user;
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         LDAP::createUser($this->user);
     }
 }
diff --git a/src/app/Jobs/ProcessUserDelete.php b/src/app/Jobs/ProcessUserDelete.php
index 58d45b93..8720d43c 100644
--- a/src/app/Jobs/ProcessUserDelete.php
+++ b/src/app/Jobs/ProcessUserDelete.php
@@ -1,43 +1,46 @@
 <?php
 
 namespace App\Jobs;
 
 use Illuminate\Bus\Queueable;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 
 class ProcessUserDelete implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     protected $user;
 
     public $tries = 5;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job instance.
      *
      * @param \App\User $user The user to delete.
      *
      * @return void
      */
     public function __construct(\App\User $user)
     {
         $this->user = $user;
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         //
     }
 }
diff --git a/src/app/Jobs/ProcessUserRead.php b/src/app/Jobs/ProcessUserRead.php
index 125cc49d..feef61c5 100644
--- a/src/app/Jobs/ProcessUserRead.php
+++ b/src/app/Jobs/ProcessUserRead.php
@@ -1,43 +1,46 @@
 <?php
 
 namespace App\Jobs;
 
 use Illuminate\Bus\Queueable;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 
 class ProcessUserRead implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     protected $user;
 
     public $tries = 5;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job instance.
      *
      * @param \App\User $user The user to read.
      *
      * @return void
      */
     public function __construct(\App\User $user)
     {
         $this->user = $user;
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         //
     }
 }
diff --git a/src/app/Jobs/ProcessUserUpdate.php b/src/app/Jobs/ProcessUserUpdate.php
index 0aa30f4d..b0928450 100644
--- a/src/app/Jobs/ProcessUserUpdate.php
+++ b/src/app/Jobs/ProcessUserUpdate.php
@@ -1,44 +1,47 @@
 <?php
 
 namespace App\Jobs;
 
 use App\Backends\LDAP;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 
 class ProcessUserUpdate implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     protected $user;
 
     public $tries = 5;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job instance.
      *
      * @param \App\User $user The user for which to process the update.
      *
      * @return void
      */
     public function __construct(\App\User $user)
     {
         $this->user = $user;
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         LDAP::updateUser($this->user);
     }
 }
diff --git a/src/app/Jobs/SignupVerificationEmail.php b/src/app/Jobs/SignupVerificationEmail.php
index d9812eb0..dd578fce 100644
--- a/src/app/Jobs/SignupVerificationEmail.php
+++ b/src/app/Jobs/SignupVerificationEmail.php
@@ -1,60 +1,63 @@
 <?php
 
 namespace App\Jobs;
 
 use App\Mail\SignupVerification;
 use App\SignupCode;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Illuminate\Support\Facades\Mail;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 
 class SignupVerificationEmail implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     /** @var int The number of times the job may be attempted. */
     public $tries = 2;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /** @var SignupCode Signup verification code object */
     protected $code;
 
 
     /**
      * Create a new job instance.
      *
      * @param SignupCode $code Verification code object
      *
      * @return void
      */
     public function __construct(SignupCode $code)
     {
         $this->code = $code;
     }
 
     /**
      * Determine the time at which the job should timeout.
      *
      * @return \DateTime
      */
     public function retryUntil()
     {
         // FIXME: I think it does not make sense to continue trying after 1 hour
         return now()->addHours(1);
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         Mail::to($this->code->data['email'])->send(new SignupVerification($this->code));
     }
 }
diff --git a/src/app/Jobs/SignupVerificationSMS.php b/src/app/Jobs/SignupVerificationSMS.php
index a4189faf..03586352 100644
--- a/src/app/Jobs/SignupVerificationSMS.php
+++ b/src/app/Jobs/SignupVerificationSMS.php
@@ -1,58 +1,61 @@
 <?php
 
 namespace App\Jobs;
 
 use App\SignupCode;
 use Illuminate\Bus\Queueable;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 
 class SignupVerificationSMS implements ShouldQueue
 {
     use Dispatchable;
     use InteractsWithQueue;
     use Queueable;
     use SerializesModels;
 
     /** @var int The number of times the job may be attempted. */
     public $tries = 2;
 
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
     /** @var SignupCode Signup verification code object */
     protected $code;
 
 
     /**
      * Create a new job instance.
      *
      * @param SignupCode $code Verification code object
      *
      * @return void
      */
     public function __construct(SignupCode $code)
     {
         $this->code = $code;
     }
 
     /**
      * Determine the time at which the job should timeout.
      *
      * @return \DateTime
      */
     public function retryUntil()
     {
         // FIXME: I think it does not make sense to continue trying after 1 hour
         return now()->addHours(1);
     }
 
     /**
      * Execute the job.
      *
      * @return void
      */
     public function handle()
     {
         // TODO
     }
 }