All CollectionsFAQsFAQsAnswers to frequently asked questions.39 articlesDoes Maildoso support List-Unsubscribe (one-click unsubscribe) headers?Why List-Unsubscribe / List-Unsubscribe-Post headers (and PTR records) don't pass through on Maildoso SMTP, and what to do instead to stay compliant.Can I move my mailboxes to another domain?There's no in-place mailbox-to-domain transfer. How to move mailboxes to a domain already on your account vs. one you haven't connected yet.IMAP connects but times out, is refused, or returns no response — what to checkHow to tell a server-side IMAP connectivity problem apart from a login/credentials error, and what to send support so we can check the specific mail server.Domains flagged as blacklisted: how we help, and where refunds fit inA blacklist flag is almost never a dead end — SURBL listings don't affect delivery at all. Always share your details with support first so we can fix it; a…Deleting, replacing, reducing, or cancelling mailboxes and domainsHow to delete, replace, reduce, or cancel mailboxes and domains — mailboxes are self-serve, domain removal goes through support, and what to tell us so we action the right one.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.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.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…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.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.My 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.My emails are sending with a delayWhy emails may go out later than scheduled, and what it means for deliverability.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 mailbox was deactivatedThe two common reasons a mailbox is deactivated (billing or sending limit) and how to reactivate.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 accounts got disconnected from SmartleadWhy Smartlead can disconnect inboxes and how to reconnect them.Why am I charged for a replacement domain?Domains are free at setup; replacing a domain costs $12. How that differs from transfers.Can I add a profile picture to my mailboxes?Profile pictures are supported on Google Workspace mailboxes only, not SMTP.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.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.One of my sending IPs shows as blacklistedIP rotation means tools may flag a previously-used IP; UCEPROTECT can be ignored.Instantly is asking for a verification code — where does it go?Verification codes go to the individual mailbox, not the Master Inbox.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.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.I'm not receiving emails that people send to my Maildoso mailboxWhat to check when someone emails your Maildoso mailbox, your mail server accepts it, but the message never shows up — no bounce, no error, and nothing in Junk or…What are the guidelines for sending targeted, automated B2B cold emails using Maildoso?What are the best practices for configuring domains for Maildoso email campaigns?Which TLDs are safe vs. risky for cold email, how to check domain reputation before using it, and why to keep campaign domains separate from your main website.How can I migrate mailboxes from Maildoso to Mailreach?What do the domain statuses 'Processing' and 'Inactive/Blocked' mean in Maildoso, and how can I resolve them?