You will be asked for a date. “How long until we are back?” is a reasonable question from your founder, and it does not have a provider-issued answer. IP reputation and domain reputation recover when the mail you send stops looking like the mail that caused the problem. The calendar is a consequence, not a setting.
Last verified: 26 September 2026, against Google’s sender guidelines FAQ and Postmaster documentation.
How long does it take to fix email deliverability?
There is no fixed number of days. How long it takes to fix email deliverability depends on the cause. A broken authentication record can be fixed the day you publish the correction. A damaged sender reputation follows the mail you send afterwards, so the honest answer is “as long as it takes for your complaint rate, bounces and engagement to look different”. The only clock Google prints is the seven consecutive days under a 0.30% spam rate that mitigation eligibility requires, and that is not a promise that inbox placement returns on day seven.
Two reputations, two clocks you do not get to set
IP reputation and domain reputation are different inputs. They also fail differently, and they heal differently.
| IP reputation | Domain reputation | |
|---|---|---|
| What it follows | The sending IP, including neighbors on a shared pool | The domain in the visible From address, and the domains you authenticate |
| Who controls the history on a typical Klaviyo shared pool | The pool. Your campaign is one tenant. | You, if the From domain is your brand |
| What a new one buys you | A cold IP that still has to be warmed | A cold domain that still has to be warmed |
| Published recovery date | None | None. One Gmail mitigation rule has a seven-day condition. |
Moving from a shared IP to a dedicated IP does not donate the shared pool’s good history, and it does not delete your domain’s bad history. The dedicated vs shared IP piece is the decision. This page is only about time.
The one number Google actually prints
Google’s sender guidelines FAQ says that if your user-reported spam rate is 0.30% or higher, you are ineligible for mitigation until the rate has stayed below 0.30% for seven consecutive days. The same FAQ says you should keep the rate below 0.10%, and that changes in spam rate can take time to affect classification.
Read that narrowly:
- It is a Gmail rule about mitigation eligibility.
- It is not Yahoo’s rule, and it is not Outlook’s.
- It is not “domain reputation is healthy on day eight.”
- It does not start until the rate is actually under 0.30%. Seven days of hoping do not count.
Yahoo’s requirement for bulk senders is a complaint rate under 0.30% on mail delivered to the inbox. Yahoo does not attach a seven-day sentence to that figure. Microsoft’s 550 5.7.515 article does not list a complaint percentage as the cause of that rejection. Do not export Gmail’s seven days into those inboxes.
What to do while sender reputation recovers
- Stop the mail that produced the complaints or the bounces. The first 24 hours is the containment. A recovery clock cannot start while that mail is still going out.
- Keep authentication aligned on the domain you are trying to rehabilitate. A DNS fix is fast. It does not erase complaint history.
- Resume with the people who still open and buy. Volume without engagement is how the spam rate stays above the line you need.
- Judge the week on Postmaster spam rate, Yahoo’s complaint view, and placement at Gmail, Yahoo, AOL and Outlook. An Outlook rejection (
550 5.7.515) happens at SMTP time and shows in the bounce log, not as a folder placement. - Write down what “recovered” means before you scale: spam rate under the provider’s published guidance, and placement back to the pattern you had before the incident. Then scale. The postmortem is where that definition gets recorded.
If the temptation is to abandon the domain, read changing a sending domain first, including whether a new domain resets reputation. A weekend domain swap in the middle of a complaint spike is a second cold start, not a recovery. The damaged sender reputation fix page has the short checklist version of this section.
InboxEagle
Check your spam rate against the 0.30% line
Enter sends and spam complaints to see where you sit against Gmail's 0.10% guideline and the 0.30% mitigation line. The seven-day count only starts once you are under it.
Sources
- Email sender guidelines FAQ, Google. The 0.30% spam rate and the seven consecutive days of mitigation eligibility.
- Email sender guidelines, Google. The guidance to stay under 0.10% and avoid 0.30%.
- Postmaster Tools, Google. How spam rate is calculated, and the status of reputation cards.
- Sender best practices, Yahoo. Complaint rate under 0.30% for bulk senders, with no recovery-day count attached.