{"componentChunkName":"component---src-templates-tag-js","path":"/tags/email/","result":{"data":{"site":{"siteMetadata":{"title":"LoginRadius Blog"}},"allMarkdownRemark":{"totalCount":4,"edges":[{"node":{"fields":{"slug":"/engineering/html-email-concept/"},"html":"

The two types of email you can send and receive are plain text emails (any email that contains just plain old text with no formatting) and HTML emails, these are formatted and styled using HTML and inline CSS.\nHTML email is the use of HTML to provide formatting and semantic markup capabilities in an email that are not available in plain text.

\n

An HTML email is designed just like a website with the help of graphics, table columns, colors and links. A non-programmer can also create it since email marketing services provide flexible campaign builders. Email client vendors have not been as developing as web browser vendors in adopting new standards.

\n

Definition

\n

Emails which are formatted using Hypertext Markup Language(HTML), as opposed to plain text email.

\n

How to Create an HTML Email

\n

Many tools that create and send an email will offer pre-formatted, already built HTML templates that allow you to design emails without knowing or accessing any code of back-end.

\n

The best way to understand any process is to do it yourself, from level zero. We make any changes in the email editor; those changes will be automatically coded into the final result. This email building tool is the best option if you don't have an email designer, but you still want to send any professional marketing emails.

\n

If you want more control over the code of your emails and you are comfortable with HTML(that is just basic and easy), most email tools will allow you to import HTML files directly for using it as custom email templates. They have a wide variety of free HTML email templates available on the internet, and if you are familiar with HTML, it is a straightforward process to use that template in the email building tool of your own choice.

\n

To create an HTML email from scratch, you will need to have advanced knowledge of HTML. Because creating an HTML email from scratch can be quite tricky, we recommend you to work with a developer for this process, or you may go with a template for an easy process.

\n

If you choose to code your HTML email by hand, these are the necessary steps you need to use while creating HTML email:

\n
    \n
  1. The perfect email template size should have 600-700 max-width.
    2. \n
  2. If the design has animation, then use .gif animated file because interactive elements like Flash, JavaScript, or HTML forms won't work in most email inboxes.
    3. \n
  3. Try to use HTML tables (HTML tables present tabular data in a semantic and structurally appropriate manner) for your presentation.
    4. \n
  4. To improve the presentation of Web, use inline CSS within your HTML email.
    5. \n
  5. CSS style should be either in a separate CSS file or below the body tag and not under the head tag.
    6. \n
  6. To save yourself from trouble, avoid the use of CSS shorthand code.
    7. \n
  7. The most genuine way of coding background colors is to use six-digit hexadecimal code for color (like #000000, i.e. for black).
    8. \n
  8. Be sure always to use \"display: block;\" for your image tags (either inline or embedded CSS) because this takes the baseline out of the equation and keeps everything arranged neatly and in order.
    9. \n
  9. If you wish to have padding on columns, it might be more cross-browser, so you can always create spacer DIVs in between the columns (or between rows).
    10. \n
  10. You need to use absolute paths for your images.
    11. \n
  11. Try adding a line-height and font-size of 1 under \"\" (or the desired size).
    12. \n
  12. Inline styles to and tables are the right way to go for Html email.
    13. \n
  13. In an HTML table, you can set the cell padding and cell spacing to zero to eliminate the unwanted spacing in your layout.
    14. \n
\n

How to send HTML emails through Outlook?

\n
    \n
  1. Select more commands to customize your quick access toolbar(suggestion).
    2. \n
  2. Choose \"attach\" function and then \"add\" it to the toolbar.
    3. \n
  3. Open \"attach a file\" window from the quick access toolbar.
    4. \n
  4. Select HTML file you need to import BUT do not click to INSERT yet.
    5. \n
  5. Switch \"insert\" button with the \"insert as a text\" button and click.
    6. \n
  6. Now, you can send it to your audience.
    7. \n
\n

You can check HTML Email Template here:

\n

HTML Email Templates

\n","frontmatter":{"date":"October 09, 2020","updated_date":null,"title":"HTML Email Concept","tags":["Html","Email"],"coverImage":{"childImageSharp":{"fluid":{"aspectRatio":1.7699115044247788,"src":"/static/68cacf6be60ee3e735f59ee70958946b/ee604/email_picture.png","srcSet":"/static/68cacf6be60ee3e735f59ee70958946b/69585/email_picture.png 200w,\n/static/68cacf6be60ee3e735f59ee70958946b/497c6/email_picture.png 400w,\n/static/68cacf6be60ee3e735f59ee70958946b/ee604/email_picture.png 800w,\n/static/68cacf6be60ee3e735f59ee70958946b/05d05/email_picture.png 1080w","sizes":"(max-width: 800px) 100vw, 800px"}}},"author":{"id":"Nivedita Singh","github":"Nivedita967","avatar":null}}}},{"node":{"fields":{"slug":"/engineering/email-verification-api/"},"html":"

Introduction

\n

Authentication is the necessary implementation for secure and genuine access to resources of web and mobile applications. It helps to authorize the user and provide access control for applications based on the user’s credentials.

\n

There are various authentication mechanisms like Email, Phone numbers, Biometrics, etc. However, Email is still considered the primary means of authentication because other mechanisms are not as optimized or in approach to everyone.

\n

So it is safe to say that most of your application users used email for creating their accounts. With that, some users tend to use disposable email services for fake account creation. These fake accounts result in additional liability to your application resources and servers.

\n

You can effectively reduce such spams for your applications by analyzing the user’s email address during registration for the following aspects:

\n\n

There are some tools available that could help you analyze the above factors, and one such tool is EVA, an Email Verification API. It is a free API and analyzes the user’s email for all of the factors mentioned above.

\n

API Details

\n

The details of Email Verification API (API) is as follows:

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
ParametersValue
URLhttps://api.eva.pingutil.com/email
Query Param{ email: test@mail7.io }
Response{ \"status\": \"success\", \"data\": { \"email_address\": \"test@mail7.io\", \"domain\": \"mail7.io\", \"valid_syntax\": true, \"disposable\": true, \"deliverable\": true }}
\n

Valid_syntax, disposable, and deliverable are three attributes of this API, let’s see how these works:

\n

Output Parameters:

\n

valid_syntax\nThis attribute verifies the syntax of the entered email address matches the standard email address format or not. It is useful in the cases where the end-user might misspell email addresses while typing.

\n

disposable\nThis attribute verifies whether the entered email address domain belongs to the disposable email service. EVA checks the email address against a valid database of more than 4500 disposable email services. Thus, it can effectively help the developer to prevent users from registering using disposable email.

\n

deliverable\nThis attribute verifies whether the email domain has valid MX records or not. The email address is considered deliverable if the valid MX record for the email domain is found.

\n
\n

Note: A mail exchanger record (MX record) specifies the mail server responsible for accepting email messages on behalf of a domain name. It is a resource record in the Domain Name System (DNS).

\n
\n

The response received for the above three attributes of API can help you take further action. These attributes are not just limited to registration use cases, you can utilize them for other use cases like if you have an existing user base but would like to limit the spammers (who have registered using disposable emails) from commenting on the blog or accessing your application resources.

\n

This API tool has been developed and designed as a way of giving back to the developer community initiative by LoginRadius Developers. Your opinion is important to us. This way we can keep improving our product for the developer community. Please share your feedback here

\n","frontmatter":{"date":"August 31, 2020","updated_date":null,"title":"Email Verification API (EVA)","tags":["Free tool","Developer Resources ","Verification","Email"],"coverImage":{"childImageSharp":{"fluid":{"aspectRatio":1.7699115044247788,"src":"/static/4991e427faf331bcbd24d1c66c1cad40/ee604/eva.png","srcSet":"/static/4991e427faf331bcbd24d1c66c1cad40/69585/eva.png 200w,\n/static/4991e427faf331bcbd24d1c66c1cad40/497c6/eva.png 400w,\n/static/4991e427faf331bcbd24d1c66c1cad40/ee604/eva.png 800w,\n/static/4991e427faf331bcbd24d1c66c1cad40/f3583/eva.png 1200w,\n/static/4991e427faf331bcbd24d1c66c1cad40/e4d72/eva.png 1280w","sizes":"(max-width: 800px) 100vw, 800px"}}},"author":{"id":"Aman Agrawal","github":"aman-agrwl","avatar":null}}}},{"node":{"fields":{"slug":"/engineering/sending-emails-with-golang/"},"html":"

Before You Get Started

\n

This tutorial assumes you have:

\n\n

In this blog, we’ll look at different methods to send an email with Go, First, we will explore inbuilt smtp package, then we will move to use a popular package Gomail and finally, we will send HTML emails using custom templates.

\n

Package smtp

\n

smtp is an inbuilt package provided with Golang. It implements the Simple Mail Transfer Protocol and has multiple functionalities related to it. Here to send the email we will be using only two functions PlainAuth and SendMail from the package.

\n
\n

Note: Click here for an overview on Go Functions

\n
\n\n

Below is the complete code to send a plain text email with smtp package in golang.

\n
package main\n\nimport (\n  "fmt"\n  "net/smtp"\n)\n\nfunc main() {\n\n  // Sender data.\n  from := "from@gmail.com"\n  password := "<Email Password>"\n\n  // Receiver email address.\n  to := []string{\n    "sender@example.com",\n  }\n\n  // smtp server configuration.\n  smtpHost := "smtp.gmail.com"\n  smtpPort := "587"\n\n  // Message.\n  message := []byte("This is a test email message.")\n  \n  // Authentication.\n  auth := smtp.PlainAuth("", from, password, smtpHost)\n  \n  // Sending email.\n  err := smtp.SendMail(smtpHost+":"+smtpPort, auth, from, to, message)\n  if err != nil {\n    fmt.Println(err)\n    return\n  }\n  fmt.Println("Email Sent Successfully!")\n}
\n
\n

In the above code example we have used smtp details of a Gmail account, you should update the smtp detail according to your email provider.

\n
\n
\n

Just to explain things easily, In the above snippet, we have written all the smtp and email credentials in the main function, Though in a production app you should always use env variables for configurations. You can check Viper to manage configurations in production apps.

\n
\n

Package Gomail

\n

Below is the complete code to send a plain text email with Gomail package in golang.

\n
package main\n\nimport (\n  "crypto/tls"\n  "fmt"\n\n  gomail "gopkg.in/mail.v2"\n)\n\nfunc main() {\n  m := gomail.NewMessage()\n\n  // Set E-Mail sender\n  m.SetHeader("From", "from@gmail.com")\n\n  // Set E-Mail receivers\n  m.SetHeader("To", "to@example.com")\n\n  // Set E-Mail subject\n  m.SetHeader("Subject", "Gomail test subject")\n\n  // Set E-Mail body. You can set plain text or html with text/html\n  m.SetBody("text/plain", "This is Gomail test body")\n\n  // Settings for SMTP server\n  d := gomail.NewDialer("smtp.gmail.com", 587, "from@gmail.com", "<email_password>")\n\n  // This is only needed when SSL/TLS certificate is not valid on server.\n  // In production this should be set to false.\n  d.TLSConfig = &tls.Config{InsecureSkipVerify: true}\n\n  // Now send E-Mail\n  if err := d.DialAndSend(m); err != nil {\n    fmt.Println(err)\n    panic(err)\n  }\n\n  return\n}
\n

Custom HTML Templates

\n

Now, let's send an HTML email with smtp package, for this, we need to create two files in the root folder.

\n\n
<!-- template.html -->\n<!DOCTYPE html>\n<html>\n<body>\n    <h3>Name:</h3><span>{{.Name}}</span><br/><br/>\n    <h3>Email:</h3><span>{{.Message}}</span><br/>\n</body>\n</html>
\n

We are using text/template package to parse HTML files and use it in smtp SendMail function.

\n
package main\n\nimport (\n  "bytes"\n  "fmt"\n  "net/smtp"\n  "text/template"\n)\n\nfunc main() {\n\n  // Sender data.\n  from := "from@gmail.com"\n  password := "<Email Password>"\n\n  // Receiver email address.\n  to := []string{\n    "sender@example.com",\n  }\n\n  // smtp server configuration.\n  smtpHost := "smtp.gmail.com"\n  smtpPort := "587"\n\n  // Authentication.\n  auth := smtp.PlainAuth("", from, password, smtpHost)\n\n  t, _ := template.ParseFiles("template.html")\n\n  var body bytes.Buffer\n\n  mimeHeaders := "MIME-version: 1.0;\\nContent-Type: text/html; charset=\\"UTF-8\\";\\n\\n"\n  body.Write([]byte(fmt.Sprintf("Subject: This is a test subject \\n%s\\n\\n", mimeHeaders)))\n\n  t.Execute(&body, struct {\n    Name    string\n    Message string\n  }{\n    Name:    "Puneet Singh",\n    Message: "This is a test message in a HTML template",\n  })\n\n  // Sending email.\n  err := smtp.SendMail(smtpHost+":"+smtpPort, auth, from, to, body.Bytes())\n  if err != nil {\n    fmt.Println(err)\n    return\n  }\n  fmt.Println("Email Sent!")\n}
\n

Once done you need to run below command to send the emails

\n
go run main.go
\n
\n

If you don't want to create your custom HTML emails, Hermes is a package that generates clean, responsive HTML e-mails for sending transactional e-mails.

\n
\n

Now you can send beautiful emails to the customer by your golang application, You can found the complete code used in this blog on our Github Repo

\n","frontmatter":{"date":"August 03, 2020","updated_date":null,"title":"Different ways to send an email with Golang","tags":["Go","Email"],"coverImage":{"childImageSharp":{"fluid":{"aspectRatio":1.5037593984962405,"src":"/static/0ac40484af2392675963fb3327b3dbb4/14b42/email_cover.jpg","srcSet":"/static/0ac40484af2392675963fb3327b3dbb4/f836f/email_cover.jpg 200w,\n/static/0ac40484af2392675963fb3327b3dbb4/2244e/email_cover.jpg 400w,\n/static/0ac40484af2392675963fb3327b3dbb4/14b42/email_cover.jpg 800w,\n/static/0ac40484af2392675963fb3327b3dbb4/47498/email_cover.jpg 1200w,\n/static/0ac40484af2392675963fb3327b3dbb4/0e329/email_cover.jpg 1600w,\n/static/0ac40484af2392675963fb3327b3dbb4/52258/email_cover.jpg 1800w","sizes":"(max-width: 800px) 100vw, 800px"}}},"author":{"id":"Puneet Singh","github":"puneetsingh24","avatar":null}}}},{"node":{"fields":{"slug":"/engineering/how-to-get-email-alerts-for-unhandled-php-exceptions/"},"html":"

This tutorial provides a solution to get email alerts, when a unhandled error occurs. For this tutorial, we are using WordPress.

\n

Imagine you created a php application and it’s running fine.  A couple of days later, a user complains about an error which you’re totally unaware of. Such unhandled errors are very common in php applications. So, to find these issues, we are going to send email notifications whenever an error occurs.

\n

Step 1. First of all we need to identify a common application file that include at top of application. in this case the file is “wp-config.php” at the root of your wordpress hosting directory.

\n

Step 2. Let’s add the following line of code in this file under php tag.

\n
set_error_handler('errorHandler'); // this line of code sets an error handler custom function to handle any php error. And here we pass our custom function that name “errorHandler”\n\nfunction createTable($array){\n    if(is_array($array) && count($array)>0){\n        $errorContent = "<table border = 1><tr><td>";\n        foreach ($array as $key => $val) {\n            $errorContent .= $key . "</td><td>";\n            if(is_array($val) && count($val)>0){\n                $errorContent .= createTable(json_decode(json_encode($val),true)) ;\n            }else{\n                $errorContent .= print_r($val, true) ;\n            }\n        }\n        $errorContent .= "</td></tr></table>";\n        return $errorContent;\n    }\n    return '';\n}\n \n/**\n * \n * @param type $errorNumber        // This parameter returns error number.\n * @param type $errorString           // This parameter returns error string.\n * @param type $errorFile               // This parameter returns path of file in which error found.\n * @param type $errorLine              // This parameter returns line number of file in which you get an error.\n * @param type $errorContext         // This parameter return error context.\n */\nfunction errorHandler($errorNumber, $errorString, $errorFile, $errorLine, $errorContext) {\n    $emailAddress = 'example@example.com';\n    $emailSubject = 'Error on my Application';\n    $emailMessage = '<h2>Error Reporting on :- </h2>[' . date("Y-m-d h:i:s", time()) . ']';\n    $emailMessage .= "<h2>Error Number :- </h2>".print_r($errorNumber, true).'';\n    $emailMessage .= "<h2>Error String :- </h2>".print_r($errorString, true).'';\n    $emailMessage .= "<h2>Error File :- </h2>".print_r($errorFile, true).'';\n    $emailMessage .= "<h2>Error Line :- </h2>".print_r($errorLine, true).'';\n    $emailMessage .= "<h2>Error Context :- </h2>".createTable($errorContext);\n    $headers = "MIME-Version: 1.0" . "rn";\n    $headers .= "Content-type:text/html;charset=UTF-8" . "rn";\n    mail($emailAddress, $emailSubject, $emailMessage, $headers); // you may use SMTP, default php mail service OR other email sending process\n}
\n

Step 3. Now save the file and upload on server.

\n

Whenever we got any error in wordpress then above code will send an email to given email-address (example@example.com). You can use the above code on production websites to improve application performance and track all errors that’s are missed.

\n

Similarly we can use above code in drupal, joomla, and many other content management systems.
\nCommon config files on other platforms are listed below:

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
CMS/application nameLocation of common file
4Images Gallery/config.php
B2 Evolution/conf/_basic_config.php
Boonex Dolphin/inc/header.inc.php
Concrete5/config/site.php
Coppermine Photo Gallery/include/config.inc.php
Crafty Syntax Live Help/config.php
Cube Cart/includes/global.inc.php
dotProject/includes/config.php
Drupal/sites/default/settings.php
e107/e107_config.php
FAQMasterFlex/faq_config.php
Gallery/config.php
Geeklog/db-config.php or /siteconfig.php or /lib-common.php
glfusion/private/db-config.php
Hotaru/hotaru_settings.php
Joomla/configuration.php
LiveSite/livesite/config.php
LifeType/config/config.properties.php
Mambo/configuration.php
Marketecture/include/config.php
MODx/manager/includes/config.inc.php
Moodle/config.php
MyBB/inc/config.php
Noahs Classifieds/app/config.php
Nucleus/config.php
ocPortal/info.php
OpenCart/config.php or /admin/config.php
osCommerce/includes/configure.php or /admin/includes/configure.php
Oxwall/ow_includes/config.php
PHP-Nuke/config.php
phpBB/config.php
phpFormGenerator/index.php or /mysql.class.php
phpFreeChat/forms/admin/config.inc.php (only if you have saved form input to a database)
PHPlist/config/config.php
phpMyDirectory/defaults.php
phpWCMS/include/inc_conf/conf.inc.php
phpWebSite/conf/config.php
PhpWiki/admin.php or /lib/config.php
Pligg/libs/dbconnect.php
Post-Nuke/config.php
PrestaShop/config/settings.inc.php
Saurus CMS/config.php
ShopSite/includes/configure.php or /admin/includes/configure.php
Siteframe/config.php
Simple Machines Forum/Settings.php
Soholaunch/sohoadmin/config/isp.conf.php
SugarCRM/config.php
Textpattern/textpattern/config.php
TikiWiki/db/local.php
Tomato Cart/includes/configure.php
TYPO3/typo3conf/localconf.php
WebCalendar/includes/settings.php
WHMCS/configuration.php
WordPress/wp-config.php
X7 Chat/config.php
Xoops/mainfile.php
Zen Cart/includes/configure.php or /admin/includes/configure.php
Zikula/config.php
\n","frontmatter":{"date":"October 26, 2015","updated_date":null,"title":"How to Get Email Alerts for Unhandled PHP Exceptions","tags":["PHP","Email"],"coverImage":{"childImageSharp":{"fluid":{"aspectRatio":1,"src":"/static/4a396ee0a823348eb1c43701756c8981/7d145/email-alerts-unhandled-php.png","srcSet":"/static/4a396ee0a823348eb1c43701756c8981/69585/email-alerts-unhandled-php.png 200w,\n/static/4a396ee0a823348eb1c43701756c8981/497c6/email-alerts-unhandled-php.png 400w,\n/static/4a396ee0a823348eb1c43701756c8981/7d145/email-alerts-unhandled-php.png 610w","sizes":"(max-width: 610px) 100vw, 610px"}}},"author":{"id":"Team LoginRadius","github":"LoginRadius","avatar":null}}}}]}},"pageContext":{"tag":"Email"}},"staticQueryHashes":["1171199041","1384082988","2100481360","23180105","528864852"]}