Version 1.0 · Effective date: October 15, 2026 · Mailbari LLC
Last Updated: October 15, 2026
Mailbari is business email: messages between people, with customers, suppliers and colleagues. It is not a bulk or marketing email service. Each User can send to a set number of outside recipients a day, every message must come from a real, identifiable sender, and every marketing message must have a working unsubscribe. If complaints or bounces rise, we pause sending first and talk to you, so that one account cannot damage delivery for everyone else.
Gmail, Outlook.com, Yahoo and other mailbox providers decide whether to deliver Mailbari mail based on the reputation of our servers and of each sending domain. Since 2024, Gmail requires every sender to authenticate its mail and keep its spam complaint rate below 0.3%, and since May 2025 Outlook.com rejects mail from high-volume domains that fail SPF, DKIM or DMARC. One account sending spam can get our shared servers blocked for every customer, so we take these limits seriously.
For this policy, spam is any email sent to people who did not ask for it or agree to receive it, especially when sent in bulk. Examples: 1. Messages to purchased, rented, scraped or harvested address lists. 2. Cold messages sent in bulk to people with no business relationship with you. 3. Marketing to people who have unsubscribed or who never opted in. 4. Messages with false or misleading sender names, subject lines or headers. 5. Messages sent through many accounts or domains to get around limits. 6. Chain letters, pyramid schemes and affiliate spam. One-to-one business messages to a person you reasonably believe will want to hear from you, such as a quote to a lead who contacted you, are not spam.
• Outside recipients per User per day (rolling 24 hours): - Starter: 500 - Business: 1,500 - Professional: 2,000 • Recipients per message (To, Cc and Bcc together): - Starter: 100 - Business: 300 - Professional: 500 • Messages sent through the Email API per organisation per day: - Counted in the User limits above • Largest message, attachments included: - 25 MB across all plans Recipients inside your own organisation do not count towards the daily limit. New organisations may have lower limits for their first 30 days while their domain builds a reputation. If you reach a limit, further messages are held until the 24 hours roll over, and you get a notice. Custom limits for good reasons can be discussed at [email protected], but Mailbari will not raise limits for marketing campaigns.
4.1 You may send occasional newsletters or announcements to people who have opted in to hear from your business, within the limits above. 4.2 Every marketing message must: 1. Identify your business clearly in the From name and the body. 2. Have a truthful subject line. 3. Include your business postal address, as the US CAN-SPAM Act requires. 4. Include a clear unsubscribe link or instructions, and you must act on every unsubscribe within 10 business days (sooner where your law says so). 5. Follow the anti-spam law where your recipients are, such as the EU and UK rules that generally require prior consent for marketing email. 4.3 For regular campaigns to large lists, use a dedicated email marketing service with its own sending domain or subdomain. Mailbari cannot be used as the sending engine for such services.
5.1 Every domain you send from must have the SPF, DKIM and DMARC records shown in Admin › Domains. Mailbari signs all outgoing mail with DKIM for your domain. 5.2 We do not let anyone send from a domain that has not been verified in their organisation. 5.3 We recommend a DMARC policy of "quarantine" or "reject" once your reports show all your legitimate mail passes. The admin panel suggests when it is safe to switch.
We watch feedback loops from mailbox providers, spam reports, bounces and blocklists for each User and domain. We take action if, over any 7 days: • Spam complaint rate: - We review at: 0.1% - We pause sending at: 0.3% • Hard bounce rate (addresses that do not exist): - We review at: 5% - We pause sending at: 10% • Listing on a major blocklist caused by your mail: - We review at: Any listing - We pause sending at: Any listing that affects other customers
1. Notice. We email the Admins about the problem and what to fix. 2. Paused sending. Sending is paused for the User or domain involved while you investigate. Receiving mail and all other services keep working. 3. Suspension. If spam continues or the account is clearly compromised, we suspend the User, the domain or the organisation. 4. Termination. For repeated or deliberate spam, phishing or malware, we close the organisation without a refund. A compromised account sending spam is paused straight away. We help you secure it, then restore sending once the password is reset and two-step login is on. Most problems end at a notice or a short pause; only continued spam, phishing or malware leads to suspension or closure.
Mailbari filters incoming mail for spam, phishing and malware. Messages that are probably spam go to the Spam folder and are deleted after 30 days. Messages with malware are blocked. You can mark messages as "Not spam" or add trusted senders, and Admins can set rules for the organisation.
If you received spam sent through Mailbari, forward it with full headers to [email protected]. Mailbox providers and blocklist operators can reach our postmaster team at [email protected].
• Mailbari LLC · 104 Quigley Blvd, Ste 1013, New Castle, DE 19720, USA · +1 302 580 8514 • Bangladesh office · Rafiq Place, Level 1A, BM College Mosque Gate, Barisal-8200, Bangladesh · +880 1805 459129 • Abuse: [email protected] · Postmaster: [email protected] · Support: [email protected]