server/src/Core/Models/Mail/MailMessage.cs

using System.Collections.Generic;

namespace Bit.Core.Models.Mail
{
    public class MailMessage
    {
        public string Subject { get; set; }
        public IEnumerable<string> ToEmails { get; set; }
        public string HtmlContent { get; set; }
        public string TextContent { get; set; }
        public IDictionary<string, object> MetaData { get; set; }
    }
}