class EMail::Client::Config

• EMail::Client::Config
• Reference
• Object

Overview

SMTP client setting object.

# Create config object with the SMTP server FQDN(or IP address), port number, and helo domain.
config = EMail::Client::Config.new("your.mx.example.com", 587, helo_domain: "your.host.example.com")

TLS settings

# Use SMTP over SSL/TLS
config.use_tls(TLSMode::SMTPS)

# Use STARTTLS command to send email
config.use_tls(TLSMode::STARTTLS)

# OpenSSL::SSL::Context::Client object for STARTTLS commands.
config.tls_context

# Disable TLS1.1 or lower protocols.
config.tls_context.add_options(OpenSSL::SSL::Options::NO_SSL_V2 | OpenSSL::SSL::Options::NO_SSL_V3 | OpenSSL::SSL::Options::NO_TLS_V1 | OpenSSL::SSL::Options::NO_TLS_V1_1)

# Set OpenSSL verification mode to skip certificate verification.
config.tls_context.verify_mode = OpenSSL::SSL::VerifyMode::NONE

SMTP authentication

config.use_auth("id", "password")

Logging

# Use the client specific(non-default) logger.
config.log = Log.for("your_log_source")

Error handling

# Set SMTP error handler.
# Default: nil
config.on_failed = EMail::Client::OnFailedProc.new do |mail, command_history|
  puts mail.data
  puts ""
  puts command_history.join("\n")
end

# Set fatal error handler.
# Default: nil
config.on_fatal_error = EMail::Client::OnFatalErrorProc.new do |error|
  puts error
end

Connection timeouts

config.connect_timeout = 1 # sec
config.read_timeout = 1    # sec
config.write_timeout = 1   # sec
config.dns_timeout = 1     # sec

Misc

# Set email client name, used in log entries and Message-ID headers.
# Default: "EMail_Client"
config.name = "your_app_name"

Defined in:

email/client/config.cr

Constructors

• .new(host, port = EMail::DEFAULT_SMTP_PORT, *, helo_domain)

  Creates instance with minimam setting.

Class Method Summary

• .create(host, port = EMail::DEFAULT_SMTP_PORT, *, client_name : String? = nil, helo_domain : String, on_failed : EMail::Client::OnFailedProc? = nil, on_fatal_error : EMail::Client::OnFatalErrorProc? = nil, tls_verify_mode : OpenSSL::SSL::VerifyMode? = nil, use_tls : TLSMode = TLSMode::NONE, auth : Tuple(String, String)? = nil, log : Log? = nil, dns_timeout : Int32? = nil, connect_timeout : Int32? = nil, read_timeout : Int32? = nil, write_timeout : Int32? = nil)

  Returns EMail::Client::Config object with given settings.

Instance Method Summary

• #auth_id

  Returns authentication id when using SMTP AUTH.

• #auth_password

  Returns authentication password when using SMTP AUTH.

• #client_name : String

  Client name used in Message-Id header.

• #client_name=(new_name : String)

  Client name used in Message-ID header and log entry.

• #connect_timeout : Int32?

  CONNECT timeout for the socket.

• #connect_timeout=(sec : Int32)

  CONNECT timeout for the socket.

• #dns_timeout : Int32?

  DNS timeout for the socket.

• #dns_timeout=(sec : Int32)

  DNS timeout for the socket.

• #helo_domain : String

  Domain name for SMTP HELO / EHLO command.

• #helo_domain=(new_domain : String)

  Domain name for SMTP HELO or EHLO command.

• #host : String

  SMTP server hostname or IP address.

• #host=(host : String)

  SMTP server hostname or IP address.

• #log : Log?

  Client specific(non-default) logger.

• #log=(log : Log?)

  Client specific(non-default) logger.

• #on_failed : EMail::Client::OnFailedProc?

  Callback function to be called when the SMTP server returns 4XX or 5XX response.

• #on_failed=(on_failed : EMail::Client::OnFailedProc?)

  Callback function to be called when the SMTP server returns 4XX or 5XX response.

• #on_fatal_error : EMail::Client::OnFatalErrorProc

  Callback function to be calld when an exception is raised during SMTP session.

• #on_fatal_error=(on_fatal_error : EMail::Client::OnFatalErrorProc)

  Callback function to be calld when an exception is raised during SMTP session.

• #port : Int32

  Port number of SMTP server.

• #port=(port : Int32)

  Port number of SMTP server.

• #read_timeout : Int32?

  READ timeout for the socket.

• #read_timeout=(sec : Int32)

  READ timeout for the socket.

• #tls_context : OpenSSL::SSL::Context::Client

  OpenSSL context for the TLS connection

• #use_auth(id, password)

  Sets the client to authenticate with SMTP AUTH command by using given id and password.

• #use_auth?

  Returns true when using SMTP AUTH.

• #use_smtps?

  Returns true when using SMTPS.

• #use_starttls?

  Returns true when using STARTTLS.

• #use_tls(tls_mode : TLSMode)

  Enables TLS function to encrypt the SMTP session.

• #write_timeout : Int32?

  WRITE timeout for the socket.

• #write_timeout=(sec : Int32)

  WRITE timeout for the socket.

Constructor Detail

Class Method Detail

Instance Method Detail