export declare const emailService: {
    sendPasswordResetEmail(to: string, username: string, resetLink: string): Promise<void>;
    sendWelcomeEmail(to: string, username: string): Promise<void>;
    sendInvitationEmail(to: string, username: string, setupLink: string): Promise<void>;
    sendEmailChangeConfirmation(to: string, username: string, confirmLink: string): Promise<void>;
    sendCommunicationEmail(to: string, communicationSubject: string, communicationBodyHtml: string, communicationBodyText?: string): Promise<void>;
    verifyConnection(): Promise<boolean>;
};
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