I'm rendering HTML template for email  demo_test.module  use Drupal\Component\Utility\SafeMarkup;  function demo_test_theme() {   return [     'contact_mail' =&gt; [       'variables' =&gt; ['params' =&gt; NULL],     ]      ];  }  function demo_test_mail($key, &amp;$message, $params) {    $render_email = [     '#theme' =&gt; 'contact_email',     '#params' =&gt; $params,   ];    $mail = drupal_render($render_email);    $message['body'][] = $mail;      break;  }   contact_mail.html.twig    &lt;html&gt;   &lt;head&gt;     &lt;meta name="viewport" content="width=device-width"&gt;     &lt;meta http-equiv="Content-Type" content="text/html; charset=UTF-8"&gt;     &lt;title&gt;Test&lt;/title&gt;     &lt;style&gt;       body {         font-size: 20px;         color: #ff0000;         background-color: #FAFAFA;       }     &lt;/style&gt;   &lt;/head&gt;   &lt;body&gt;     &lt;p&gt;test&lt;/p&gt;   &lt;/body&gt; &lt;/html&gt;   Tried:  $message['headers']['Content-Type'] = 'text/html; charset=UTF-8; format=flowed; delsp=yes';   But still not working.
I am trying to use the MailManager class in Drupal 8 to send HTML mail. I got it working, but it isn't parsing the HTML markup. I think something is wrong with the headers of the email.  What I have is a custom module (Custom_forward) that contains a form and that calls Mailmanager::mail() in its submitForm() method, which contains the following code.          // Email body         $header = $sender . ' thought you would like to see this page from the website.';         $personal_message = $form_state-&gt;getValues()['message_body'];         $entity_url_value = '&lt;a href="' . $entity_url-&gt;toString() . '"&gt;Go to article&lt;/a&gt;';         $message = $header . '&lt;br&gt;' . $personal_message . '&lt;br&gt;' . $entity_url_value;          // Email         $langcode = 'en';         $mailManager = \Drupal::service('plugin.manager.mail');         $to = $form_state-&gt;getValues()['recipient'];          $params['title'] = 'Forward';         $params['message'] = $message;         $result = $mailManager-&gt;mail('custom_forward', 'forward', $to, $langcode, $params, NULL, true);          if ($result['result'] !== true) {             drupal_set_message(t('There was a problem sending your message and it was not sent.'), 'error');             \Drupal::logger('mail-log')-&gt;error($message);         }         else {             drupal_set_message(t('Your message has been sent.'));         }   According to Drupal you also need the hook_mail method in mytheme.theme to be able to send message, you can see this method here:  function custom_forward_mail($key, &amp;$message, $params) {   $message['body'] = [];   $message['subject'] = [];   $message['headers'] = array(     'content-type' =&gt; 'text/html',     'charset' =&gt; 'UTF-8',     'format' =&gt; 'flowed',     'delsp' =&gt; 'yes',     'from' =&gt; \Drupal::config('system.site')-&gt;get('mail')   );    switch ($key) {     case 'forward':       $message['subject'] = $params['title'];       $message['body'][] = '&lt;html&gt;&lt;body&gt;' . $params['message'] . '&lt;/body&gt;&lt;/html&gt;';       break;   } }   As you can see, I am setting the content type to text/html and that should tell the mail system to parse the content as an HTML, but this is not working for some reasons.  This is a testing email. All the HTML markup is not shown, but also not working.  Bassem thought you would like to see this page from the website. personal message Go to article [1] [1] http://myhost/node/81
The new software center in Ubuntu 16.04 shows no application data found This is the error I get when I open the software center. I've tried rebooting and running sudo apt-get update but I see no improvement. It worked earlier but I don't know what went wrong since then. I'm using Ubuntu 16.04 final release on a Dell Inspiron 15R. Any advice will be appreciated. Thanks in advance.  EDIT: The problem magically solved itself without me doing anything special (or maybe inadvertently doing something, I don't know). So I'd still like to get to the root of this. I've just started playing with Guice, and a use-case I can think of is that in a test I just want to override a single binding.  I think I'd like to use the rest of the production level bindings to ensure everything is setup correctly and to avoid duplication.  So imagine I have the following Module  public class ProductionModule implements Module {     public void configure(Binder binder) {         binder.bind(InterfaceA.class).to(ConcreteA.class);         binder.bind(InterfaceB.class).to(ConcreteB.class);         binder.bind(InterfaceC.class).to(ConcreteC.class);     } }   And in my test I only want to override InterfaceC, while keeping InterfaceA and InterfaceB in tact, so I'd want something like:  Module testModule = new Module() {     public void configure(Binder binder) {         binder.bind(InterfaceC.class).to(MockC.class);     } }; Guice.createInjector(new ProductionModule(), testModule);   I've also tried the following, with no luck:  Module testModule = new ProductionModule() {     public void configure(Binder binder) {         super.configure(binder);         binder.bind(InterfaceC.class).to(MockC.class);     } }; Guice.createInjector(testModule);   Does anyone know if it's possible to do what I want or am I completely barking up the wrong tree??  --- Follow up: It would seem I can achieve what I want if I make use of the @ImplementedBy tag on the interface and then just provide a binding in the test case, which works nicely when there is a 1-1 mapping between the interface and implementation.  Also, after discussing this with a colleague it would seem we'd head down the road of overriding an entire module and ensuring we have our modules defined correctly.  This seems like it might cause a problem though where a binding is misplaced in a module and needs to be moved, thus possibly breaking a load of tests as bindings may no longer be available to be overriden. One form of Jensen's inequality is     If $X$ is a random variable and $g$ is a convex function, then   $\mathbb{E}(g(X))\geq g(\mathbb{E}(X))$.   Just out of curiosity, when do we have equality? If and only if $g$ is constant? What's the best way to convert a string to an enumeration value in C#? I have an HTML select tag containing the values of an enumeration. When the page is posted, I want to pick up the value (which will be in the form of a string) and convert it to the corresponding enumeration value. In an ideal world, I could do something like this: StatusEnum MyStatus = StatusEnum.Parse(&quot;Active&quot;);  but that isn't a valid code. How to open a PDF file from terminal? I used to work on the Mac terminal before and I used:   open file2open.pdf   and the PDF file would be opened on preview or whatever my default viewer was. When I use it in the terminal in Ubuntu I get this error message:   Couldn't get a file descriptor referring to the console How to install gail and atk-bridge? How can I force SQL Server Management Studio to update the IntelliSense cache? IntelliSense in SSMS isn't updating unless I shut it down and restart. I've tried disconnecting from the server and reconnecting while the SSMS session is active, but that isn't working.  Steps to recreate:    Create a table  Select something from that table SSMS displays squiggly red lines under it with the tip "invalid object name" Execute the query   How can I force IntelliSense to update without restarting SSMS? Is it possible to copy text from image? Is there any tools to copy text from video's or images? Purpose of else and finally in exception handling AmpScript to select Right or Left characters from a string Is there an AmpScript function that can be used in an equivalent manner to sql left, right and mid functions?   Thanks, Mark Can I pass a System.Net.MailMessage to a WCF service? I'd like to setup a WCF service to send emails. The System.Net.MailMessage doesn't seem to be serializable, and cannot be passed in a [DataContract]  The error I receive is      Type 'System.Net.Mail.MailAddress'   cannot be serialized. Consider marking   it with the DataContractAttribute   Any suggestions? Is there a limit to a total number of months a holder of UK multiple entry visitor visa can spend in UK per calendar year? Set::setraw error in implementation of bisection method Experimental Fractional scaling makes fonts dirty in Ubuntu 17.10 I updated to 17.10 from 17.04.   I activated the fractional scaling by running the following command.   gsettings set org.gnome.mutter experimental-features "['scale-monitor-framebuffer']"   Then, I changed 125% scale. The scale was changed, but the fonts and icons are so dirty.    The launcher icon and font in Google Chrome and other application except the system setting are dirty.  How can I resolve this problem?  For some reason, font in the system setting is not dirty... How can I determine that I am looking at the block I need? Fibonacci sequence and Euclidean algorithm's connection. I know that the movies were written to be a stand alone universe on their own, but what key elements were missing in the movies that were vital in the books that viewers are missing out on? Adding a link with a space in front causes the link to not work When you paste a link into the "Insert Hyperlink" box, it adds it automatically as a citation link:  [Example 1][1]    [1]: http://example.com   But when you paste a link starting with a space , it tries to URL encode it, to change the space to %20, and then sticks a http:// on the front to make it a valid link:  [Example 2][2]    [2]: http://%20http://example.com   This, however, means the link doesn't work.    Please could leading whitespace be stripped from the URL? What is the formula for $\frac{1}{1\cdot 2}+\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\cdots +\frac{1}{n(n+1)}$ How can I find the formula for the following equation?  $$\frac{1}{1\cdot 2}+\frac{1}{2\cdot 3}+\frac{1}{3\cdot 4}+\cdots +\frac{1}{n(n+1)}$$  More importantly, how would you approach finding the formula? I have found that every time, the denominator number seems to go up by $n+2$, but that's about as far as I have been able to get:  $\frac12 + \frac16 + \frac1{12} + \frac1{20} + \frac1{30}...$ the denominator increases by $4,6,8,10,12,\ldots$ etc.  So how should I approach finding the formula? Thanks! Can HTML checkboxes be set to readonly? I thought they could be, but as I'm not putting my money where my mouth was (so to speak) setting the readonly attribute doesn't actually seem to do anything.  I'd rather not use Disabled, since I want the checked check boxes to be submitted with the rest of the form, I just don't want the client to be able to change them under certain circumstances.