Why we send newsletters from your own Microsoft 365 mailbox

Almost every newsletter tool works the same way under the hood: you upload your list, you write your email, and the platform sends it from a pool of IP addresses shared by thousands of other senders. Your message arrives “on behalf of” the platform, and your deliverability rides on the reputation of strangers.

We built SimpleNewsletter365 to do the opposite.

Your mailbox is the sender

When you send with SimpleNewsletter365, the newsletter goes out through your own Microsoft 365 mailbox, using Microsoft Graph, from your real address and your real domain. The same mailbox you use for one-to-one email every day is the mailbox your newsletter comes from.

That single decision has a few consequences:

• Your domain reputation carries over. Inbox providers already trust the domain you email from daily. Your newsletter inherits that trust instead of starting from a shared-pool reputation you do not control.
• No noisy neighbors. On shared platforms, another customer’s spammy send can drag down the IP you happen to share. Here, your sending stands on your own domain.
• Replies come back to you. Because you are the real sender, your authentication (SPF, DKIM, DMARC) applies exactly as it normally does, and replies land in your mailbox.

The trade-off: speed

There is one honest trade-off. Microsoft enforces per-mailbox sending limits, around 10,000 recipients per day. So a very large send is paced over time rather than blasted in one burst. We handle that pacing for you, one recipient at a time, and high-volume senders can connect more than one mailbox.

For most teams on Microsoft 365, that trade is easy: slightly paced sending in exchange for landing in the inbox as yourself.

Try it

Sending from your own mailbox works on every plan, including Free. Read the deliverability explainer or start free.