Magento/Adobe Commerce Email Configuration and Deliverability Guide

The Default Magento Email Problem

Out of the box, Magento sends email through PHP's mail() function. This means:

• Email sends from your web server's IP address (usually a shared hosting IP with terrible email reputation)
• No DKIM signing
• No SPF alignment (the sending IP doesn't match your domain's SPF record)
• No TLS encryption
• No delivery tracking or analytics

Every order confirmation, shipping notification, and password reset goes through this pipeline. If your store depends on transactional email (and it does), this is unacceptable.

Setting Up SMTP in Magento

Adobe Commerce 2.4+ (Built-in)

Navigate to Stores → Configuration → Advanced → System → Mail Sending Settings:

Transport: SMTP
Host: smtp.sendgrid.net (or your ESP)
Port: 587
Auth: Login
Username: apikey (for SendGrid) or your ESP username
Password: Your API key or password
SSL: TLS

Open Source Magento (Module Required)

Install an SMTP module:

• Mageplaza SMTP (free, most popular)
• Magepal SMTP (lightweight)
• Ebizmarts SMTP (established)

composer require mageplaza/module-smtp
bin/magento setup:upgrade
bin/magento cache:clean

Then configure in Stores → Configuration → Mageplaza → SMTP.

Authentication Setup

After configuring SMTP, set up email authentication for your sending domain:

SPF Record

Add your ESP's sending IPs to your SPF record:

v=spf1 include:sendgrid.net ~all

DKIM

Generate DKIM keys through your ESP and add the CNAME or TXT records to your DNS. Each ESP has specific requirements — check our DKIM guides.

DMARC

Add a DMARC record once SPF and DKIM are passing:

_dmarc.yourdomain.com  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]"

Practitioner note: Magento stores have the worst default email configuration of any major ecommerce platform. I've audited stores doing $10M+ in revenue that were sending order confirmations through an unauthenticated shared hosting IP. The fix takes an hour and the deliverability improvement is immediate.

Separating Transactional and Marketing Email

Don't send marketing email through the same Magento SMTP configuration as transactional email. Use separate streams:

• Transactional (order confirmations, shipping, password resets): SendGrid, Mailgun, or Amazon SES via SMTP
• Marketing (newsletters, promotions, abandoned cart): Klaviyo, Mailchimp, or another ESP with Magento integration

This protects your transactional reputation from marketing list issues. If a promotional campaign generates spam complaints, your order confirmations still reach the inbox.

Magento-Specific Email Settings

Store Email Addresses

Stores → Configuration → General → Store Email Addresses

Configure all five sender addresses (General Contact, Sales, Customer Support, Custom 1, Custom 2) with real, monitored email addresses on your domain. Don't use noreply@ for order-related emails — customers need to reply.

Transactional Email Templates

Marketing → Email Templates

Customize the default templates. Magento's built-in templates are functional but have poor image-to-text ratios. Keep customizations clean:

• Table-based layout
• Inline CSS
• Alt text on all images
• Under 80KB total weight

Practitioner note: The abandoned cart recovery emails in Magento are the most deliverability-sensitive because they go to a mix of engaged and unengaged recipients. If your SMTP isn't authenticated, these are the first emails to hit spam.

Monitoring

Once your SMTP is configured:

1. Google Postmaster Tools — monitor Gmail inbox placement
2. ESP dashboard — track delivery rates, bounces, and complaints
3. Bounce handling — configure your ESP to suppress bounced addresses
4. Magento logs — check var/log/ for email sending errors

Common Magento Email Issues

Problem	Cause	Fix
Emails not sending at all	SMTP misconfiguration or module conflict	Check SMTP credentials and test connection
Emails in spam folder	No authentication, shared IP	Set up SPF, DKIM, DMARC with proper ESP
Slow email delivery	Synchronous sending blocking page loads	Enable async email (Stores → Configuration → Sales → Sales Emails → Asynchronous Sending)
Duplicate emails	Cron job misconfiguration	Check cron schedule, verify only one email cron is running

For a full Magento email infrastructure audit, reach out for a consultation.

Sources

• Adobe Commerce: Configure Email Communications
• SendGrid: Magento Integration
• Mageplaza: SMTP Extension
• Google: Postmaster Tools

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v1.0 · April 2026