#[derive(Debug, thiserror::Error)]
pub enum EmailError {
    #[error("queue error: {0}")]
    Queue(#[from] queue::QueueError),
    #[error("serde error: {0}")]
    Serde(#[from] serde_json::Error),
    #[error("lettre smtp error: {0}")]
    Lettre(#[from] lettre::transport::smtp::Error),
    #[error("lettre address error: {0}")]
    Address(#[from] lettre::address::AddressError),
    #[error("lettre error: {0}")]
    LettreOther(#[from] lettre::error::Error),
    #[error("handlebars render error: {0}")]
    Template(#[from] handlebars::RenderError),
    #[error("handlebars template error: {0}")]
    TemplateRegister(#[from] handlebars::TemplateError),
    #[error("template not found: {0}")]
    TemplateNotFound(String),
    #[error("config invalid: {0}")]
    Config(String),
    #[error("base64 decode: {0}")]
    Base64(#[from] base64::DecodeError),
    #[error("attachment too large: {0} bytes exceeds limit {1}")]
    AttachmentTooLarge(usize, usize),
    #[error("missing required: {0}")]
    Missing(String),
    #[error("io: {0}")]
    Io(#[from] std::io::Error),
}