The suppression list ensures you never email someone who has unsubscribed, hard bounced, or marked your email as spam.

Email authentication plays a crucial role in deliverability, reducing bounces, and avoiding spam filters. Learn about DKIM, SPF, and DMARC.

Set up a custom domain name for login and deliverability benefits.

Emails not arriving in the inbox could be due to a lack of authentication, or content detected by spam filters as unsafe. Follow our tips to prevent your emails going to the junk folder.

Your bounce summary report can help you investigate delivery issues.

A professional, recognizable From name and address are important for multiple reasons.

Sending to a spam trap damages your sender reputation, resulting in delivery issues. ISPs and blocklist providers use spam traps to identify spammers, so they can block emails from them.

A sudden spike in signups, spam complaints or unsubscribes, or a drop in open rates, could be signs of a spambot attack.

Understand the difference between spam and opt-in email marketing.

Learn why you may be having trouble with emails not arriving when you send a test email to yourself, or when email campaigns are sent to people at your company.

Gmail customers who mark an email as spam are not unsubscribed from your list, although future emails sent to them will go straight to junk mail.

The anti-spam legislation of several countries requires organizations sending marketing emails to include a valid, physical postal address.

How spam complaints are made, how they affect your deliverability, and what you can do to avoid them.

You can resolve delivery issues by understanding how ISPs use blocklists and block senders. Prevent your emails landing in the junk or spam folder.

High bounce rates negatively affect your sender reputation, and can land our sending IPs on blocklists which results in delivery issues for everyone.

Solve delivery issues by looking at your bounce reasons, for example mail block - general versus spam detected. Some bounces may be caused by a temporary blocklisting.

Follow this advice to prevent your email being mistaken as a phishing attempt.

Authenticating your own sending domain with DKIM is crucial for deliverability. Avoid being perceived as a spammer by ISPs, spam filters and your recipients.

Approvals are a normal part of sending email through an email service provider. They make sure people are playing by the rules, and help keep spammers at bay.