diff --git a/README.md b/README.md
index bd9f947..31500f9 100644
--- a/README.md
+++ b/README.md
@@ -324,6 +324,18 @@ Integer.  Port on `relayhost` emails should be sent to
 
 Default: 25
 
+##### `mail_encryption`
+
+String. Encryption to be used.
+
+Default: not defined (backup currently defaults to `:starttls`.
+
+##### `mail_domain`
+
+String. Your host name for the HELO command.
+
+Default: none.
+
 ##### `enable_hc`
 
 Boolean.  Whether backup job noticies should be sent to HipChat
diff --git a/manifests/job.pp b/manifests/job.pp
index 949ede3..cc90fc5 100644
--- a/manifests/job.pp
+++ b/manifests/job.pp
@@ -68,6 +68,8 @@
   $email_to         = undef,
   $relay_host       = 'localhost',
   $relay_port       = '25',
+  $mail_domain      = undef,
+  $mail_encryption  = undef,
   # Hipchat
   $enable_hc        = false,
   $hc_success       = false,
@@ -228,8 +230,6 @@
 
     if !$email_to {
       fail("[Backup::Job::${name}]: A destination email address is required for email notifications")
-    } else {
-      validate_re($email_to, '^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$', "[Backup::Job::${name}]: ${email_to} is not a valid email address")
     }
 
     if $relay_port and !is_integer($relay_port) {
@@ -415,6 +415,8 @@
     # - $email_to
     # - $relay_host
     # - $relay_port
+    # - $mail_domain
+    # - $mail_encryption
     concat::fragment { "${_name}_email":
       target  => "/etc/backup/models/${_name}.rb",
       content => template('backup/job/email.erb'),
diff --git a/manifests/params.pp b/manifests/params.pp
index 14d2ac6..41d2f22 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -18,7 +18,7 @@
       }
     }
     'Debian': {
-      $package_dependencies = ['ruby-dev', 'libxslt1-dev', 'libxml2-dev', 'g++', 'patch']
+      $package_dependencies = ['ruby-dev', 'libxslt1-dev', 'libxml2-dev', 'g++', 'patch', 'zlib1g-dev']
       if $::lsbmajordistrelease {
         $releaseversion = $::lsbmajordistrelease
       }
diff --git a/templates/job/email.erb b/templates/job/email.erb
index c002335..6a185ca 100644
--- a/templates/job/email.erb
+++ b/templates/job/email.erb
@@ -12,5 +12,11 @@
 <% end -%>
 <% if @relay_host -%>
     mail.port                 = <%= @relay_port %>
+<% end -%>
+<% if @mail_domain -%>
+    mail.domain               = "<%= @mail_domain %>"
+<% end -%>
+<% if @mail_encryption -%>
+    mail.encryption           = <%= @mail_encryption %>
 <% end -%>
   end