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How to send bulk email without going to spam

Updated 2026-09-28

Short answer: To keep bulk email out of spam, send through a proper email service instead of your personal Gmail, make sure the sending domain has SPF, DKIM and DMARC, only email people who opted in, include a one-click unsubscribe, remove bounced addresses, and keep complaints below 0.3%. Gmail and Yahoo have required this for bulk senders since 2024.

Why bulk email from Gmail goes to spam

Personal Gmail accounts are limited to a few hundred messages a day and your address is not authenticated for bulk sending. When many people receive the same message from a personal account, filters treat it as suspicious, and one complaint can hurt the whole account.

The checklist inbox providers use

SPF and DKIM set up for the sending domain.
A DMARC record published for the domain.
A one-click unsubscribe link (List-Unsubscribe header) and a visible unsubscribe link.
Spam complaint rate under 0.3%, ideally under 0.1%.
No bought or scraped lists; only people who agreed to hear from you.
Hard bounces removed straight away.

Content that helps

A clear sender name your customers recognise.
A subject line that tells the truth about the email.
More text than images, and a plain-text version.
One main call to action.
A consistent sending schedule.

How ENB Technologies handles it

ENB sends through Amazon SES from an authenticated domain with SPF, DKIM and DMARC already in place, adds one-click unsubscribe to every email, removes invalid, bounced and unsubscribed addresses before each send, and pauses sending if bounces or complaints get too high to protect your reputation.

Frequently asked questions

What is a good spam complaint rate?

Below 0.1% is healthy. Gmail and Yahoo require bulk senders to stay under 0.3%.

Can I use my Gmail address as the sender?

Not for bulk sending: Gmail’s DMARC policy blocks other services from sending as @gmail.com. Use your business name on an authenticated domain and set replies to go to your Gmail.

How many emails can I send per day?

It depends on your service and plan. On ENB, your plan sets a monthly limit, and new accounts have a daily limit while their reputation builds.

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