Amazon SES Initial Setup Reference Articles Summary

Go-to reference articles for the initial Amazon SES setup — sending limits, sandbox exit, and SPF/DKIM/DMARC.

How to Set Up Custom Domain Email Addresses with Amazon WorkMail

Setting up custom domain email with Amazon WorkMail, forwarding, and the iOS Mail app on iPhone/iPad.

Setting Up Amazon WorkMail in iPhone Gmail App Configuration Steps

How to add an Amazon WorkMail account to the iPhone Gmail app over IMAP.

About Auth0 Change Password API Specifications

Notes on Auth0's Change Password API — Gmail alias handling and identical responses for success and failure.

Solution for Google Apps Script 'Exception: 1 日にサービス premium gmail を実行した回数が多すぎます。' (Too many executions of premium gmail service per day)

Fixing the Google Apps Script premium gmail daily execution limit error by tuning run intervals.

The dangers of managing tasks with email

A short note on why managing tasks in Gmail is risky, after misaddressing a mail almost right away.

List of disposable email address domains

References for building a disposable email domain blacklist to block throwaway sign-ups.

Email Delivery Systems: Set up SPF and DKIM Without Fail

Why SPF and DKIM are must-configure for email delivery systems, with setup docs for Amazon SES, SendGrid, G Suite, and Zendesk.

Email Marketing Services Summary (MailChimp, Mad Mimi)

A quick link memo of HTML email marketing services for newsletters: MailChimp and Mad Mimi.

Email Configuration Check Services ~ SPF, IP Reputation

Post-setup email checks: MxToolBox for SPF and Cisco Talos for IP reputation after configuring AWS SES.

[Mail] Slide Material for Easy Understanding of Email Systems

A link memo for a SlideShare deck that explains the basics of email systems, '#Mailerstudy'.

[Facebook] Developer/HTML5 Blog, Weekly Platform Updates, Platform Status and Other Information Now Available via Email Subscription

Facebook Developers now offers email subscriptions to its Developer Blog, HTML5 Blog, Weekly Platform Updates, and Platform Status.

[Facebook] About @proxymail.facebook.com Email Addresses

A note on the @proxymail.facebook.com address behavior in Facebook apps and its later specification change.

Set Up Email Sending and Receiving with Custom Domain Free Email Forwarding Service Forward Email

Setting up Forward Email for a custom domain as a free migration destination from the retired free G Suite.

Forward Email emails not reaching Gmail properly due to Delivery Status Notification errors

Why Forward Email deliveries to Gmail started failing — the address landed on Forward Email's denylist via a spammed contact form.

G Suite Administrator Post-Implementation Configuration Checklist

A post-deployment G Suite admin checklist — security, end-user access, Drive sharing, and email hardening.

[G Suite] Email and Group Message Sending Limits

Official G Suite help links for email and Google Groups sending limits, plus a DAEMON error tip.

Site That Shows Global Email Client Market Share

A reference site for global email client market share, useful when deciding which clients to test HTML emails on.

[Gmail] Advanced Search, Custom Search, etc.

A quick pointer to Gmail's official advanced search help page for custom search queries.

[Gmail] Delivery Status Notification (Delay)

Gmail's Delivery Status Notification (Delay) turned out to be an over-quota storage issue on the forwarding destination.

[Gmail] Does GIF Image Files Have a Bug Where They Display Partially Cropped?

Some GIFs render partially cropped through Gmail's image proxy cache — swapping to PNG was the workaround.

[Gmail] Setting and using multiple stars other than the default star

Enabling Gmail's multiple stars and narrowing them down to a small set that stays manageable in daily use.

[Google Apps] How to disable Gmail spam filter settings

The three types of spam filters in Google Apps Gmail and how to disable each of them.

Google Calendar's 'Daily Agenda' Email Setting Should Be Enabled

How to enable Google Calendar's Daily Agenda email so your schedule arrives at 5 AM each day.

How to turn off 'Will you attend?' email notifications from guests invited to Google Calendar

Turn off Google Calendar's email notifications for guest Yes/Maybe/No responses via Event Responses > None.

[G Suite] Administrator setting to disable Gmail automatic email forwarding

Notes on using G Suite admin settings to disable Gmail auto-forwarding as a data-leak prevention measure.

[G Suite] Setting Up Auto-Reply for Group Email

Steps for enabling auto-reply on G Suite group email addresses, with notes on the four scope options.

[G Suite] How to Turn Off 'Pending Messages' Feature

How to turn off pending message moderation for G Suite group email addresses.

[Heroku] SendGrid Email Sending Configuration Method for Rails 5.x

Wire up the SendGrid Heroku add-on to Rails 5.x ActionMailer and send a test email from the console.

Email and Slack message templates for announcing 2FA activation to your company

Email and Slack message templates for asking coworkers to turn on 2FA, with Google and Slack help links.

Reference Articles for Determining 'Is an Email Address Personal Information?'

Reference notes on whether email addresses count as personal information in Japan, with citations.

Mastodon email sending configuration - Gmail Edition

How to configure a self-hosted Mastodon instance to send email through Gmail via .env.production SMTP settings.

Microsoft Outlook URL Character Limit: 1024 Characters

Outlook cuts URLs at 1024 characters — here's the limit and how URL shorteners work around it.

The MIME Type for .msg File Extension is application/vnd.ms-outlook

A short note that the MIME type for the .msg file extension is application/vnd.ms-outlook.

[Nagios] Changing Alert Email Content

Defining a custom Nagios notify command so alert emails are readable for non-engineer team members.

npm Juice Converts CSS in style Tags to Inline Styles - Convenient for HTML Emails

A quick look at npm Juice for inlining CSS in HTML emails, plus an online converter and Gmail notes.

Switching Onamae.com Name Servers from dns01.gmoserver.jp to 01.dnsv.jp Broke POP/SMTP Server Connection

Onamae.com nameserver switch broke POP/SMTP access to Onamae Mail — updating stale credentials fixed it.

How to Cancel Onamae.com Email Service

Step-by-step cancellation of Onamae Mail Lite from Onamae.com Navi after a Google Workspace test.

Onamae Email MX Record TTL Cannot Be Changed with Default Name Servers

You cannot change the MX record TTL for Onamae Mail while using its default nameservers.

How to Use Onamae Email with IMAP

For Google Workspace's Data Migration Service, Onamae Mail IMAP uses the POP server hostname.

Registering for Onamae.com's Onamae Mail and Initial Setup

Domain purchase to Onamae Mail Lite plan sign-up and initial setup, done at minimum cost.

Sending and Receiving Email on an xxx.onmicrosoft.com Address — How Licenses and Mailboxes Fit Together

Create a Microsoft 365 tenant and you get an address like `user@contoso.onmicrosoft.com` automatically, yet when you try to send or receive on it, mail may not even arrive. The reason is that the Entra ID account you sign in with and the Exchange Online mailbox that stores mail are two separate things. This post walks through why it doesn't work by default, which license to buy and assign, and the outbound sending cap that starts biting onmicrosoft.com senders in 2026, following the actual admin steps.

Domain Names Handled by Microsoft's Free Email Outlook.com

A note on the outlook.jp / outlook.com / hotmail.co.jp / live.jp domains Outlook.com covers, and setting up account aliases.

[Ruby on Rails] Email Sending Process with Action Mailer

How to configure Rails' Action Mailer to send email via Gmail SMTP.

[Ruby on Rails] How to Use Helper Methods in ActionMailer Views

Using add_template_helper to make custom helpers available inside ActionMailer views.

[Ruby on Rails] How to Configure Amazon SES (Simple Email Service)

Setting up Amazon SES over SMTP in Rails 3.2.5 with the aws-ses gem.

[Ruby on Rails][Haml] Use Backslashes for Line Breaks in Text Mail

Notes on using backslashes (\) to add line breaks inside Haml text-mail templates.

How to Share and Use Email Addresses - Google Workspace, Microsoft 365

Reference links for shared mailboxes in Google Workspace and Microsoft 365.

[Android] SP mode mail's received/sent email font size is too large or too small

Fixing mismatched SP mode mail font sizes on Android by updating to the Docomo mail app.

Setting Up SPF, DKIM, and DMARC

Setting up SPF and DKIM for a Google Workspace domain and verifying PASS in Gmail message headers.

Supabase Auth Custom SMTP Comparison - Evaluating All 6 Services from the Official Docs

Supabase Auth's default SMTP only sends to pre-authorized addresses, making it unusable in production. The official docs list 6 supported SMTP services under 'How to set up a custom SMTP server?' This post compares all 6 by free tier, SMTP configuration, and ease of setup.

[Symfony1.4] Implementing Email Distribution Processing

Reference docs I used when implementing email distribution in Symfony 1.4.

How to Send Emails (Newsletters) with WordPress + MailPoet 3

How to send newsletters with WordPress and MailPoet 3, plus the merits and demerits I ran into using it.

[WordPress] Fixed Email Sending Issue with WP Mail SMTP Version 1.7.0

How I fixed WP Mail SMTP 1.7.0 by swapping the From Email and From Name fields back to their correct values.

WP Mail SMTP Authentication Gmail Password Uses Google App Password

Generating a Google App Password so WP Mail SMTP can authenticate against a 2FA-protected Gmail account.

Use a different email address than the one used in Zendesk as the 'from' for emails sent to Zendesk

Sending to Zendesk from one of your own support addresses turns it into a suspended ticket — use a different from address instead.

How to send emails from Zendesk using G Suite group custom domain email addresses

Send Zendesk email from a G Suite group address on your custom domain, with Route 53 and SPF setup.