105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package smtp
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import (
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"context"
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"github.com/emersion/go-smtp"
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"github.com/getsentry/sentry-go"
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"github.com/rs/zerolog"
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"gitlab.com/etke.cc/postmoogle/email"
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)
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const (
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// NoUserCode SMTP code
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NoUserCode = 550
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// BannedCode SMTP code
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BannedCode = 554
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)
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var (
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// NoUserEnhancedCode enhanced SMTP code
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NoUserEnhancedCode = smtp.EnhancedCode{5, 5, 0}
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// BannedEnhancedCode enhanced SMTP code
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BannedEnhancedCode = smtp.EnhancedCode{5, 5, 4}
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// ErrBanned returned to banned hosts
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ErrBanned = &smtp.SMTPError{
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Code: BannedCode,
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EnhancedCode: BannedEnhancedCode,
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Message: "please, don't bother me anymore, kupo.",
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}
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// ErrNoUser returned when no such mailbox found
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ErrNoUser = &smtp.SMTPError{
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Code: NoUserCode,
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EnhancedCode: NoUserEnhancedCode,
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Message: "no such user here, kupo.",
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}
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)
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type mailServer struct {
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bot matrixbot
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log *zerolog.Logger
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domains []string
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sender MailSender
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}
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// Login used for outgoing mail submissions only (when you use postmoogle as smtp server in your scripts)
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func (m *mailServer) Login(state *smtp.ConnectionState, username, password string) (smtp.Session, error) {
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m.log.Debug().Str("username", username).Any("state", state).Msg("Login")
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if m.bot.IsBanned(state.RemoteAddr) {
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return nil, ErrBanned
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}
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if !email.AddressValid(username) {
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m.log.Debug().Str("address", username).Msg("address is invalid")
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m.bot.BanAuth(state.RemoteAddr)
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return nil, ErrBanned
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}
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roomID, allow := m.bot.AllowAuth(username, password)
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if !allow {
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m.log.Debug().Str("username", username).Msg("username or password is invalid")
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m.bot.BanAuth(state.RemoteAddr)
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return nil, ErrBanned
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}
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return &outgoingSession{
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ctx: sentry.SetHubOnContext(context.Background(), sentry.CurrentHub().Clone()),
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sendmail: m.sender.Send,
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privkey: m.bot.GetDKIMprivkey(),
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from: username,
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log: m.log,
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domains: m.domains,
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getRoomID: m.bot.GetMapping,
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fromRoom: roomID,
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tos: []string{},
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}, nil
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}
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// AnonymousLogin used for incoming mail submissions only
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func (m *mailServer) AnonymousLogin(state *smtp.ConnectionState) (smtp.Session, error) {
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m.log.Debug().Any("state", state).Msg("AnonymousLogin")
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if m.bot.IsBanned(state.RemoteAddr) {
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return nil, ErrBanned
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}
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return &incomingSession{
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ctx: sentry.SetHubOnContext(context.Background(), sentry.CurrentHub().Clone()),
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getRoomID: m.bot.GetMapping,
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getFilters: m.bot.GetIFOptions,
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receiveEmail: m.ReceiveEmail,
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ban: m.bot.BanAuto,
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greylisted: m.bot.IsGreylisted,
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trusted: m.bot.IsTrusted,
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log: m.log,
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domains: m.domains,
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addr: state.RemoteAddr,
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tos: []string{},
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}, nil
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}
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// ReceiveEmail - incoming mail into matrix room
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func (m *mailServer) ReceiveEmail(ctx context.Context, eml *email.Email) error {
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return m.bot.IncomingEmail(ctx, eml)
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}
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