All CollectionsFAQsFAQsAnswers to frequently asked questions.30 articlesMy mailboxes show as "burned", "blacklisted", or low reputation — what it meansA "burned" label, a blacklist flag, and a real Google rejection are three different situations with three different answers. How to tell them apart and what to do for each.Domain redirects: what they do and how to set your redirect URLWhat a domain redirect is, why it matters for cold email, how to set or change your redirect URL in Bulk actions, and how to fix common issues.Understanding your mailbox reputation scores (Google Score & Microsoft Score)Where to find the Google Score and Microsoft Score in your dashboard, what they measure, why new mailboxes read low, and what actually affects them.Understanding your Warmup & Deliverability InsightsWhere to find the Insights page (Warmup pool quality, Cold sending hygiene, warmup pool by provider, mailbox volume), what each section shows, and why it may look sparse for a…Why aren't attachments being sent when I reply from a mailbox?If attachments get dropped when replying from certain mailboxes — even small files — here's why, and the workaround that also helps deliverability.Why do I get "Provider maildoso temporarily not supported" when syncing to my sequencer?Why the one-click sequencer sync fails for some mailboxes, and how to connect them with a CSV/API upload instead.My domain shows "MANUALLY DISABLED" — can it be reactivated?What MANUALLY DISABLED means: registry-suspended TLDs (.online/.xyz/.site) can't be reactivated; internal disables can.Instantly is asking for a verification code — where does it go?Verification codes go to the individual mailbox, not the Master Inbox.One of my sending IPs shows as blacklistedIP rotation means tools may flag a previously-used IP; UCEPROTECT can be ignored.Why does the recipient see a different sender or domain? (mailbox rotation)Intelligent mailbox rotation is intentional; replies still route back to the original mailbox.Can I forward my replies to my personal Gmail or Outlook?How forwarding works for SMTP vs Google Workspace mailboxes and how to route replies to a personal inbox.Can I add a profile picture to my mailboxes?Profile pictures are supported on Google Workspace mailboxes only, not SMTP.My domains are listed on SURBL / a blacklist — what should I do?Quick answer: SURBL doesn't affect inbox placement in 2026; keep sending.Why am I charged for a replacement domain?Domains are free at setup; replacing a domain costs $12. How that differs from transfers.My accounts got disconnected from SmartleadWhy Smartlead can disconnect inboxes and how to reconnect them.My domain shows "missing MX records" or I'm not getting repliesWhat to do when a domain looks inactive / missing MX or replies aren't arriving.My mailbox was deactivatedThe two common reasons a mailbox is deactivated (billing or sending limit) and how to reactivate.I get an authentication error (535 / IMAP) when connecting my mailboxFixing "authentication failed" / 535 / IMAP connection failures when adding a mailbox to a sequencer.My emails are sending with a delayWhy emails may go out later than scheduled, and what it means for deliverability.Logging in to your Google Workspace mailboxes (password and one-time code)Where to find the username, password, and one-time code for your Google Workspace mailboxes, and why IMAP settings may appear blank.Why are my mailboxes or domains suddenly disconnected, inactive, or missing?A quick guide to the most common reasons your mailboxes or domains can suddenly show as disconnected, inactive, or missing — and how to get everything reconnected.Landing in the inbox with Outlook and Microsoft recipientsHow to improve inbox placement when you email Outlook, Hotmail, Live, and Microsoft 365 recipients with your Maildoso mailboxes.The checkout or payment page is blank or won't loadWhat to do when the checkout page shows up blank or won't complete, including buying additional mailboxes.A checker tool says my PTR or reverse DNS (rDNS) is failingWhy third-party tools may flag PTR/reverse DNS on your sending servers, and why it does not affect your cold email deliverability.I paid for domains but the Domains page shows 0 (and I can't add or register any)What to do when your payment went through but your Domains page is empty and you can't select or register domains.Can I host a website or add A/CNAME records on my Maildoso sending domain?How DNS is managed on your Maildoso domains, and your options if you want to host a website or point records to your own server.My CC or BCC recipients didn't receive the emailWhat to check when a copy of a sent message never arrives, and how we investigate it.Can you give me the IP addresses of your sending servers?Why we don't publish outbound IPs, and what to do when a blocklist asks for them.My emails are sending from the wrong domain or addressWhat it means when a recipient sees a different sending domain than expected, and how to tell normal mailbox rotation apart from a real problem.I'm getting "Domain limit exceeded" when adding domains through the APIWhat the "Domain limit exceeded. Current: 0, Limit: 0" API error means and how to get it resolved.