Diagnose common issues with domains, warming, DNS, and billing.
If a connected domain won't verify, either Winnr can't see your new nameservers yet, or (on the manual method) a record doesn't exist, doesn't match what Winnr expects, or hasn't propagated. This walks through diagnosis for nameservers and for each record individually.
A domain that stays in Pending, Setting up, Pending NS, or DNS Records Pending longer than expected usually comes down to a multi-domain order still working through its schedule, nameservers not yet detected, or manual DNS records that don't match. This walks through the diagnosis in order.
Bounces are usually list-quality issues, such as invalid recipients or full mailboxes. Rejections are receiver-side blocks from spam filters, rate limits, or authentication failures. This tells them apart and fixes each.
If the universal inbox isn't showing recent replies, the cause is usually that no sync has run since the reply arrived, the reply was hidden as warmup mail, or the reply never reached the mailbox at all.
If Smartlead, Instantly, or another sending tool can't log in to a Winnr mailbox, it's almost always credentials (typo, changed password, wrong host or port), a mailbox that isn't ready, or an account that's past due or on hold. This is the diagnosis.
A sudden drop in warming health score means more warmup mail is landing in spam. The usual causes are a new blocklist listing, cold sending that outpaced warming, content or list problems in your campaigns, or a DNS problem on the domain. This is the diagnosis order.
If one of your domains lands on a blocklist, sending from it will underperform badly. Priority order. Stop sending from it, confirm which list and why, replace the domain so campaigns keep running, and fix whatever caused the listing.