Two ways to connect
How you connect a Maildoso mailbox to a sequencer like Lemlist depends on the mailbox type. SMTP (Maildoso) mailboxes and Google Workspace mailboxes connect differently — they are not interchangeable.
SMTP (Maildoso) mailboxes — connect via CSV / IMAP & SMTP
In Maildoso, go to Email accounts and click Export to CSV (use the "Other" format if your tool isn't listed).
In Lemlist, add each mailbox using the IMAP and SMTP details from that file (host
smtp.maildoso.comport 587, IMAPimap.apollo.maildoso.comport 993).Recommended Lemlist settings: enable SSL for IMAP and disable SSL (use STARTTLS) for SMTP.
Google Workspace mailboxes — do NOT use the CSV / smtp.maildoso.com method
Google Workspace mailboxes are hosted by Google, not on Maildoso's SMTP servers. Pointing a sequencer at smtp.maildoso.com with a Google Workspace mailbox will fail with a "535 authentication failed" error — this is expected, not a propagation delay. Connect them one of these ways instead:
Recommended: go to Settings → Sequencers, pick your sequencer, click Configure and enter your credentials. Then open Email accounts, filter Provider = Google Workspace, select the mailboxes and click Add to sequencer (this uses Google OAuth).
To connect a Google Workspace mailbox directly to your own tool, use the username, password and OTP shown on the mailbox card (click the mailbox → details on the right), or the API under Settings. There is no IMAP host in the CSV for Google Workspace mailboxes.
If you're building your own sending app over SMTP/IMAP, use SMTP (Maildoso) mailboxes rather than Google Workspace.
Custom open/click tracking domains aren't supported
Maildoso fully manages DNS for your domains and does not allow third-party CNAME/TXT records. That means a sequencer's custom tracking domain (used for open/click tracking, which needs a CNAME) cannot be verified on a Maildoso-managed domain. Sending works normally; only the sequencer's own open/click tracking on that custom domain won't validate.
How long it takes
For Google Workspace mailboxes, the connection to a sequencer can take 2 to 24 hours to finish. If a mailbox still isn't connecting after that, reach out with the mailbox name and we'll take a look.