Tag Archives: Technical

In this tutorial, learn how to view, flush, and purge queued mail in Postfix. The post How to Flush the Mail Queue in Postfix appeared first on SendGrid.

Learn how to deliver email through Twilio SendGrid using the Python Flask framework and the Flask-Mail extension.  The post Sending Emails from Python Flask Applications With Twilio SendGrid appeared first on SendGrid.

Learn how the Twilio SendGrid engineering team has scaled its infrastructure over the years to send over 3 trillion emails. The post Scale by Design: 3T Emails and Growing appeared first on SendGrid.

Learn about the differences between ports 465 and 587, why there's so much confusion around the ports, and how to best use these ports. The post What’s the Difference Between Ports 465 and 587? appeared first on SendGrid.

The CCPA gives consumers more control over their data and how it can be used, but only applies to businesses meeting specific criteria. The post What is the California Consumer Privacy Act? appeared first on SendGrid.

Read through a step-by-step tutorial to send custom exception reporting emails with Twilio SendGrid for Python-built Flask web applications. The post Custom Error Report Emails for Python Flask Web Apps with Twilio SendGrid appeared first on SendGrid.

We've found that most errors with PHP mail() stem from Postfix being configured incorrectly. This tutorial shows you how to configure and test Postfix and PHP mail(). The post Why Isn’t the PHP Mail Function Sending Mail? appeared first on SendGrid.

In this tutorial, you'll learn how to use Python and Flask web framework to forward emails from Twilio SendGrid to your web application. The post How to Receive Emails with the Flask Framework for Python appeared first on SendGrid.

Read our API article if you want to know more details about APIs, but don't consider yourself "technical." The post What is an API? [Quick Read] appeared first on SendGrid.

Return-path is a hidden email header that indicates where and how bounced emails will be processed and is used for collecting and processing bounced messages. The post What is Return-Path? appeared first on SendGrid.

Add another layer of email protection and build your brand with a new standard known as BIMI. The post What Is BIMI? (Brand Indicators for Message Identification) appeared first on SendGrid.

Learn about Domain Keys Identified Mail (DKIM) and how the email authentication technique improves your overall email deliverability. The post How to Use DKIM to Prevent Domain Spoofing appeared first on SendGrid.

Learn more about the protocol encryption command, StartTLS, and how email is encrypted when sending via SMTP. The post What is StartTLS? appeared first on SendGrid.

Learn about the Bring Your Own IP (BYOIP) process, pros, and cons to decide if BYOIP is the right solution for your email program. The post Is BYOIP Right for Your Email Program? appeared first on SendGrid.

Learn the ins and outs of password reset emails from what recipients expect in their emails to deliverability tips to ensure your password reset emails land in the inbox. The post Password Reset Email Message Examples + Deliverability Tips appeared first on SendGrid.

In the 1970s, while the early drafts of the Internet were being developed, a competing model for networking was being put together by the ISO (International Organization for Standardization). The OSI (Open Systems Interconnection) Model broke the work needed to implement a distributed network service into seven separate layers of abstraction, from the physical infrastructure at layer one all the way up to the application…

Find out how you can spellcheck all of your work in HTML and markdown by adding this spellchecker feature to your NodeJS projects. The post Add a Spellcheck Feature to Your NodeJS Project appeared first on SendGrid.

Learn how we prepared for our highest sending volume of the year, so we could have a seamless and successful Black Friday weekend. The post Breakfast With a Billion Emails appeared first on SendGrid.

Yesterday I learned that some ESPs don’t support the reply to: address. I asked around to discover which ESPs did. Here’s what I learned. ESPs that support reply-to: ActiveCampaignAmazonSESConstantContactCampaign MonitorCordialDelivraDoListEloquaEmmaEpsilonGetResponseHubSpotiContactListrakMailkitMailUpMarketoN6PardotwordResponsysSailthruSFMCSharpspringTwilio / SendGridZeta Global Thanks to all the colleagues who answered my question.

Some notes on some of the different protocols used for authentication and authentication-adjacent things in email. Some of this is oral history, and some of it may be contradicted by later or more public historical revision. SPF Associates an email with a domain that takes responsibility for it. Originally Sender Permitted From, now Sender Policy Framework. It allows a domain owner to announce which IP…