Preventing spam from php mail












0















I have made a new website for learning web development and I was taught to use the php mail function to send emails. When I use the following code in the headers to send an email to my gmail address:



$headers = "MIME-Version: 1.0" . "rn";
$headers .= "Content-type:text/html;charset=UTF-8" . "rn";
$headers .= 'From: <admin@myWebsite.com>' . "rn";


I noticed that the email has a question mark next to it and gmail says: "Gmail couldn't verify that myWebsite.com actually sent this message (and not a spammer)." Is there any way to prevent this from happening?



As for my second question; I noticed that when I changed the last line of the header to:



$headers .= 'From: <admin@someOtherWebsite.com>' . "rn";


The email still gets sent like it came from another person's domain. (Although with the same warning mentioned above). But if the header is changed to:



$headers .= 'From: <admin@gmail.com>' . "rn"; 


Then no email is sent. So can someone tell me what is google doing to prevent others from using php mail to send fraudulent emails using their domain?










share|improve this question



























    0















    I have made a new website for learning web development and I was taught to use the php mail function to send emails. When I use the following code in the headers to send an email to my gmail address:



    $headers = "MIME-Version: 1.0" . "rn";
    $headers .= "Content-type:text/html;charset=UTF-8" . "rn";
    $headers .= 'From: <admin@myWebsite.com>' . "rn";


    I noticed that the email has a question mark next to it and gmail says: "Gmail couldn't verify that myWebsite.com actually sent this message (and not a spammer)." Is there any way to prevent this from happening?



    As for my second question; I noticed that when I changed the last line of the header to:



    $headers .= 'From: <admin@someOtherWebsite.com>' . "rn";


    The email still gets sent like it came from another person's domain. (Although with the same warning mentioned above). But if the header is changed to:



    $headers .= 'From: <admin@gmail.com>' . "rn"; 


    Then no email is sent. So can someone tell me what is google doing to prevent others from using php mail to send fraudulent emails using their domain?










    share|improve this question

























      0












      0








      0








      I have made a new website for learning web development and I was taught to use the php mail function to send emails. When I use the following code in the headers to send an email to my gmail address:



      $headers = "MIME-Version: 1.0" . "rn";
      $headers .= "Content-type:text/html;charset=UTF-8" . "rn";
      $headers .= 'From: <admin@myWebsite.com>' . "rn";


      I noticed that the email has a question mark next to it and gmail says: "Gmail couldn't verify that myWebsite.com actually sent this message (and not a spammer)." Is there any way to prevent this from happening?



      As for my second question; I noticed that when I changed the last line of the header to:



      $headers .= 'From: <admin@someOtherWebsite.com>' . "rn";


      The email still gets sent like it came from another person's domain. (Although with the same warning mentioned above). But if the header is changed to:



      $headers .= 'From: <admin@gmail.com>' . "rn"; 


      Then no email is sent. So can someone tell me what is google doing to prevent others from using php mail to send fraudulent emails using their domain?










      share|improve this question














      I have made a new website for learning web development and I was taught to use the php mail function to send emails. When I use the following code in the headers to send an email to my gmail address:



      $headers = "MIME-Version: 1.0" . "rn";
      $headers .= "Content-type:text/html;charset=UTF-8" . "rn";
      $headers .= 'From: <admin@myWebsite.com>' . "rn";


      I noticed that the email has a question mark next to it and gmail says: "Gmail couldn't verify that myWebsite.com actually sent this message (and not a spammer)." Is there any way to prevent this from happening?



      As for my second question; I noticed that when I changed the last line of the header to:



      $headers .= 'From: <admin@someOtherWebsite.com>' . "rn";


      The email still gets sent like it came from another person's domain. (Although with the same warning mentioned above). But if the header is changed to:



      $headers .= 'From: <admin@gmail.com>' . "rn"; 


      Then no email is sent. So can someone tell me what is google doing to prevent others from using php mail to send fraudulent emails using their domain?







      email phpmailer






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 23 '18 at 0:33









      blahblah

      163




      163
























          1 Answer
          1






          active

          oldest

          votes


















          0














          Your mail server isn't configured as tight as it could be.



          You should make sure that SPF records are set for your domain, that you have proper Reverse DNS for the name your mail server uses in its HELO statement, and set up and use SSL for SMTP (ESMTP), easy to do with a letsencrypt cert.






          share|improve this answer























            Your Answer






            StackExchange.ifUsing("editor", function () {
            StackExchange.using("externalEditor", function () {
            StackExchange.using("snippets", function () {
            StackExchange.snippets.init();
            });
            });
            }, "code-snippets");

            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "1"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53439414%2fpreventing-spam-from-php-mail%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            0














            Your mail server isn't configured as tight as it could be.



            You should make sure that SPF records are set for your domain, that you have proper Reverse DNS for the name your mail server uses in its HELO statement, and set up and use SSL for SMTP (ESMTP), easy to do with a letsencrypt cert.






            share|improve this answer




























              0














              Your mail server isn't configured as tight as it could be.



              You should make sure that SPF records are set for your domain, that you have proper Reverse DNS for the name your mail server uses in its HELO statement, and set up and use SSL for SMTP (ESMTP), easy to do with a letsencrypt cert.






              share|improve this answer


























                0












                0








                0







                Your mail server isn't configured as tight as it could be.



                You should make sure that SPF records are set for your domain, that you have proper Reverse DNS for the name your mail server uses in its HELO statement, and set up and use SSL for SMTP (ESMTP), easy to do with a letsencrypt cert.






                share|improve this answer













                Your mail server isn't configured as tight as it could be.



                You should make sure that SPF records are set for your domain, that you have proper Reverse DNS for the name your mail server uses in its HELO statement, and set up and use SSL for SMTP (ESMTP), easy to do with a letsencrypt cert.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 23 '18 at 0:41









                ivanivanivanivan

                1,618268




                1,618268






























                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Stack Overflow!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53439414%2fpreventing-spam-from-php-mail%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    Popular posts from this blog

                    404 Error Contact Form 7 ajax form submitting

                    How to know if a Active Directory user can login interactively

                    TypeError: fit_transform() missing 1 required positional argument: 'X'