WP Mail SMTP troubleshooting

Introduction

My WordPress blog use WP Mail SMTP by WPForms as SMTP mail plugin, and this article records some of my troubleshooting of integration.

Mail Sender’s Name is always not set

If you use Gmail as SMTP provider, the mail’s Sender Name may always appear your gmail mail address even though you had the From Name option in the plugin or the Name option in Gmail settings correctly set. This occurs when the From Email of WP Mail SMTP plugin option was not same as your Gmail account. Change it to your Gmail address will fix the issue.

Comment’s rely has notification mail to the author

WordPress doesn’t automatically send out email to notify the author of the comment when some one reply. You can add following code snippets to functions.php of your theme to solve it.

Note:  Your WP Mail SMTP plugin should work correctly first.

function comment_mail_notify($comment_id) {
    $comment = get_comment($comment_id);
    $parent_id = $comment->comment_parent ? $comment->comment_parent : '';
    $spam_confirmed = $comment->comment_approved;
    if (($parent_id != '') && ($spam_confirmed != 'spam')) {
        $wp_email = 'no-reply@' . preg_replace('#^www.#', '', strtolower($_SERVER['SERVER_NAME']));
        $to = trim(get_comment($parent_id)->comment_author_email);
        $subject = '[通知]您的留言有了新的回复';
        $message = '
            <div style="background:#ececec;width: 100%;padding: 50px 0;text-align:center;">
            <div style="background:#fff;width:750px;text-align:left;position:relative;margin:0 auto;font-size:14px;line-height:1.5;">
                    <div style="zoom:1;padding:25px 40px;background:#518bcb; border-bottom:1px solid #467ec3;">
                        <h1 style="color:#fff; font-size:25px;line-height:30px; margin:0;"><a href="' . get_option('home') . '" style="text-decoration: none;color: #FFF;">' . htmlspecialchars_decode(get_option('blogname'), ENT_QUOTES) . '</a></h1>
                    </div>
                <div style="padding:35px 40px 30px;">
                    <h2 style="font-size:18px;margin:5px 0;">Hi ' . trim(get_comment($parent_id)->comment_author) . ':</h2>
                    <p style="color:#313131;line-height:20px;font-size:15px;margin:20px 0;">您有一条留言有了新的回复，摘要信息请见下表。</p>
                        <table cellspacing="0" style="font-size:14px;text-align:center;border:1px solid #ccc;table-layout:fixed;width:500px;">
                            <thead>
                                <tr>
                                    <th style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:normal;color:#a0a0a0;background:#eee;border-color:#dfdfdf;" width="235px;">原文</th>
                                    <th style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:normal;color:#a0a0a0;background:#eee;border-color:#dfdfdf;" width="235px;">回复</th>
                                    <th style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:normal;color:#a0a0a0;background:#eee;border-color:#dfdfdf;" width="100px;">作者</th>
                                    <th style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:normal;color:#a0a0a0;background:#eee;border-color:#dfdfdf;" width="90px;" >操作</th>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">' . trim(get_comment($parent_id)->comment_content) . '</td>
                                    <td style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">'. trim($comment->comment_content) . '</td>
                                    <td style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">' . trim($comment->comment_author) . '</td>
                                    <td style="padding:5px 0;text-indent:8px;border:1px solid #eee;border-width:0 1px 1px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;"><a href="'.get_comment_link( $comment->comment_ID ).'" style="color:#1E5494;text-decoration:none;vertical-align:middle;" target="_blank">查看回复</a></td>
                                </tr>
                            </tbody>
                        </table>
                        <br> 
                    <div style="font-size:13px;color:#a0a0a0;padding-top:10px">该邮件由系统自动发出，如果不是您本人操作，请忽略此邮件。</div>
                    <div class="qmSysSign" style="padding-top:20px;font-size:12px;color:#a0a0a0;">
                        <p style="color:#a0a0a0;line-height:18px;font-size:12px;margin:5px 0;">' . htmlspecialchars_decode(get_option('blogname'), ENT_QUOTES) . '</p>
                        <p style="color:#a0a0a0;line-height:18px;font-size:12px;margin:5px 0;"><span style="border-bottom:1px dashed #ccc;" t="5" times="">' . date("Y年m月d日",time()) . '</span></p>
                    </div>
                </div>
            </div>
        </div>';
        $headers = "Content-Type: text/html; charset=" . get_option('blog_charset') . "n";
        wp_mail( $to, $subject, $message,$headers);
    }
}
add_action('comment_post', 'comment_mail_notify');

Reference : oldpan.me

The reference’s  original code has a bug which causes mail’s From Name not set when using Gmail as SMTP provider, I fix it by remove from tag in headers.