Connecting Your Mailbox
To connect a mailbox:
- Go to Mailboxes and click 'Add Mailbox'.
- Select your email provider (Gmail, Outlook, Hostinger, Zoho, etc.) or choose Custom IMAP/SMTP.
- Enter your full email address as the username.
- Enter your password — for Gmail you must use an App Password (not your regular password); for Outlook and Microsoft 365 choose Sign in with Microsoft, no password to type. For Hostinger, use your regular email password. See the Provider Setup Guides below for provider-specific instructions.
- The SMTP and IMAP server settings fill in automatically for most providers as soon as you type your email address. Check them against the server settings below or the Provider Setup Guides if you have a custom setup.
- Click 'Test Connection' to verify everything works before saving.
- Once connected, your mailbox will show a green 'Connected' status.
You can connect multiple mailboxes to your workspace. Each mailbox can be assigned to campaigns independently. Connected mailbox limits by tier: Pro 50, Enterprise 400, Ultimate 800 mailboxes per account. Free plan includes 1 mailbox, Lite includes 3.
Server settings for popular email hosts (outgoing = SMTP, incoming = IMAP):
- GoDaddy — outgoing smtpout.secureserver.net, port 587 · incoming imap.secureserver.net, port 993
- Namecheap Private Email — outgoing mail.privateemail.com, port 587 · incoming mail.privateemail.com, port 993
- Titan — outgoing smtp.titan.email, port 587 · incoming imap.titan.email, port 993
- Purelymail — outgoing smtp.purelymail.com, port 587 · incoming imap.purelymail.com, port 993
- IONOS — outgoing smtp.ionos.com, port 587 · incoming imap.ionos.com, port 993 (if your IONOS account is in the UK, Germany, Spain or France, use .co.uk, .de, .es or .fr instead of .com)
- Hostinger — outgoing smtp.hostinger.com, port 587 · incoming imap.hostinger.com, port 993
- Zoho (a mailbox on your own domain) — outgoing smtppro.zoho.com, port 587 · incoming imappro.zoho.com, port 993 (outside the US the ending follows your region, for example .eu or .in)
WarmySender fills these in for you when you type your email address, so usually you only add your password. Port 465 also works for outgoing mail if your provider prefers it.
Common mistake: the outgoing server in the incoming field. The incoming (IMAP) server is the one that reads your inbox, and it usually has a different name from the outgoing one — on GoDaddy, for example, it is imap.secureserver.net, not smtpout.secureserver.net. Sending-only services such as Mailgun, SendGrid, Resend, MailerSend, Amazon SES and Postmark have no inbox at all, so they can never be the incoming server. And the incoming server is always a server name like imap.yourprovider.com, never an email address. WarmySender points these out under the field and when you test the connection.
If connection fails, check the Troubleshooting section below for common errors like 'Authentication failed' or 'Connection refused'.