Use your inbox for conversations
Customer questions, supplier replies and individual proposals belong in a mailbox workflow. Outlook is also an email application, so the service behind it matters: Outlook.com and a Microsoft 365 business mailbox are different arrangements. Check the documentation for the account you actually use instead of applying a limit found for another product.
Use a campaign workflow for a recurring audience
For a regular newsletter, evaluate subscription forms, audience segments, unsubscribe handling and scheduled campaigns. A tool such as MailerLite, Kit or Brevo is a candidate for that job. Test the complete process with your own addresses before selecting a paid tier; the availability of a feature depends on the current plan.
An alias is an address, not another audience system
An alias can deliver mail to an existing mailbox. It does not by itself create newsletter subscriptions, campaign reports or a separate mailbox login. Receiving a test message confirms that inbound route; it does not prove that an external campaign provider has permission to send as your domain.
Keep receiving and campaign authentication separate
Your mailbox service and campaign provider may both require domain configuration for their respective roles. Follow each provider’s exact instructions. Preserve working mail routing while verifying the campaign sender. Check both a normal inbound reply and a sample campaign after changes, rather than assuming one successful test covers both directions.
Do not use a mailbox quota as a newsletter target
Microsoft documents sending limits for Outlook.com and notes that new accounts can have lower quotas. Those limits are restrictions, not a recommendation to send a newsletter by filling the Bcc field. Choose a workflow that can consistently manage subscriptions and opt-outs instead of manually maintaining a growing recipient list.
A practical startup setup
Keep a public contact address in your existing business mailbox. Add a campaign service when you have a clear newsletter purpose and a subscription process. Route replies to the contact mailbox and test that route. Budget for the two jobs separately: adding an email alias does not necessarily require another mailbox licence, while campaign pricing follows its own audience and feature rules.
Before launching the first issue
Decide what subscribers will receive and how often. Test signup, the first message, reply handling and unsubscribe with your own addresses. Document who maintains the list and who answers replies. If those basic steps are unclear, resolve them before paying for more sending capacity.
Sources and further reading
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