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IP warm-up is the process of gradually increasing send volume through a new dedicated IP address to establish a positive sending reputation with mailbox providers. Starting at full volume on a new IP results in immediate rate-limiting and deliverability problems. Migomail generates a custom warm-up schedule based on your expected send volume and manages the ramp-up automatically — you do not need to manually throttle sends during warm-up. The schedule typically runs 4–8 weeks depending on target volume.

Yes, but we strongly recommend using separate sending streams. Migomail supports dedicated IP pools and sending domains per stream type — so you can configure one set of IPs and a dedicated subdomain for marketing campaigns, and a completely separate set for transactional emails (receipts, OTPs, password resets). This isolation ensures that a reputation event on your marketing stream cannot affect delivery of your transactional messages.

Hard bounces (the receiving server permanently rejected the address) are suppressed within seconds of the SMTP response — the address is added to your account-level suppression list and will not receive future emails. Soft bounces (temporary failures) are queued for retry according to provider guidelines and suppressed if they continue to fail beyond the configured threshold. All bounce events are logged with timestamp, SMTP response code, and reason — and visible in real time during an active send.

Yes. The Migomail campaign dashboard has a Pause button that stops queuing new messages immediately. Messages already submitted to the MTA will continue to the recipient's server, but no new messages are pulled from the queue. Once you have resolved whatever prompted the pause, you can Resume and sending continues from where it stopped. If you need to stop the campaign entirely, Abort removes all queued messages permanently — only the messages already delivered remain sent.

Time-zone aware sending staggers your campaign so that every subscriber receives their email at the same local time — for example, 9:00 AM in their own time zone — rather than 9:00 AM in your sending time zone. Migomail determines each subscriber's time zone from their signup location, past engagement timestamps, or IP geolocation. The campaign is split into time zone groups and each group is queued to send at the right UTC time. A campaign to a global audience may take 24 hours to fully deliver using this mode.

Yes. You can configure multiple sending domains under a single account — for example, marketing@brand-a.com, updates@brand-b.com, and alerts@brand-c.com. Each domain has its own DKIM signing key, SPF record, dedicated IP pool assignment, and tracking subdomain. Domain reputation is tracked independently, and suppression lists can be configured per domain or globally. This is particularly useful for agencies managing multiple clients, and for brands with distinct product lines that should not share sender reputation.

Migomail's enterprise plans include a contractual inbox placement SLA of 99.2% average across Gmail, Outlook, and Yahoo — measured monthly. If your account consistently falls below this threshold, our deliverability team will work with you to diagnose and remediate the root cause. SLA performance is measured using our own seed list monitoring network across all major mailbox providers, and results are available in your account dashboard at any time.