Mail

Incoming Mail (IMAP)

• Server hostname:United States: mail.us.opalstack.com
• Germany: mail.de.opalstack.com
• Username: your mailbox name (not your email address)
• Password: your mailbox password
• Authentication type: Normal password (some clients show this as just "Password")
• Secure port - SSL: 993

Outgoing Mail (SMTP)

• Server hostname:United States: smtp.us.opalstack.com
• Germany: smtp.de.opalstack.com
• Username: your mailbox name (not your email address)
• Password: your mailbox password
• Authentication type: Normal password (some clients show this as just "Password")
• Secure port - SSL: 465
• Secure port - TLS: 587
• Sender address: domain must meet the requirements detailed in Outgoing Mail Domains

Link a documentación: https://docs.opalstack.com/user-guide/email/#email-client-configuration