# smtp

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This module implements the SMTP client protocol as specified by RFC 5321, this can be used to send mail to any SMTP Server.

This module also implements the protocol used to format messages, as specified by RFC 2822.

Example gmail use:

    var msg = createMessage("Hello from Nim's SMTP",
                            "Hello!.\n Is this awesome or what?",
                            @["foo@gmail.com"])
    let smtpConn = newSmtp(useSsl = true, debug=true)
    smtpConn.connect("smtp.gmail.com", Port 465)
    smtpConn.auth("username", "password")
    smtpConn.sendmail("username@gmail.com", @["foo@gmail.com"], $msg)

Example for startTls use:

    var msg = createMessage("Hello from Nim's SMTP",
                            "Hello!.\n Is this awesome or what?",
                            @["foo@gmail.com"])
    let smtpConn = newSmtp(debug=true)
    smtpConn.connect("smtp.mailtrap.io", Port 2525)
    smtpConn.startTls()
    smtpConn.auth("username", "password")
    smtpConn.sendmail("username@gmail.com", @["foo@gmail.com"], $msg)

For SSL support this module relies on OpenSSL. If you want to enable SSL, compile with `-d:ssl`.

# Imports

net, strutils, strtabs, base64, os, strutils, asyncnet, asyncdispatch, parsecfg

# Types

    Message = object
      msgTo: seq[string]
      msgCc: seq[string]
      msgSubject: string
      msgOtherHeaders: StringTableRef
      msgBody: string

  Source Edit

    ReplyError = object of IOError

  Source Edit

    Smtp = SmtpBase[Socket]

  Source Edit

    AsyncSmtp = SmtpBase[AsyncSocket]

  Source Edit

# Procs

    proc debugSend(smtp: AsyncSmtp; cmd: string): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect].}

  Sends `cmd` on the socket connected to the SMTP server.

  If the `smtp` object was created with `debug` enabled, debugSend will invoke `echo("C:" & cmd)` before sending.

  This is a lower level proc and not something that you typically would need to call when using this module. One exception to this is if you are implementing any SMTP extensions.

  Source Edit

    proc debugSend(smtp: Smtp; cmd: string) {...}{.raises: [SslError, OSError],
        tags: [WriteIOEffect].}

  Sends `cmd` on the socket connected to the SMTP server.

  If the `smtp` object was created with `debug` enabled, debugSend will invoke `echo("C:" & cmd)` before sending.

  This is a lower level proc and not something that you typically would need to call when using this module. One exception to this is if you are implementing any SMTP extensions.

  Source Edit

    proc createMessage(mSubject, mBody: string; mTo, mCc: seq[string];
                       otherHeaders: openArray[tuple[name, value: string]]): Message {...}{.
        raises: [], tags: [].}

  Creates a new MIME compliant message.

  You need to make sure that `mSubject`, `mTo` and `mCc` don't contain any newline characters. Failing to do so will raise `AssertionDefect`.

  Source Edit

    proc createMessage(mSubject, mBody: string; mTo, mCc: seq[string] = @[]): Message {...}{.
        raises: [], tags: [].}

  Alternate version of the above.

  You need to make sure that `mSubject`, `mTo` and `mCc` don't contain any newline characters. Failing to do so will raise `AssertionDefect`.

  Source Edit

    proc `$`(msg: Message): string {...}{.raises: [], tags: [].}

  stringify for `Message`. Source Edit

    proc newSmtp(useSsl = false; debug = false; sslContext: SslContext = nil): Smtp {...}{.
        raises: [OSError, SslError, Exception, LibraryError, IOError],
        tags: [RootEffect, ReadDirEffect].}

  Creates a new `Smtp` instance. Source Edit

    proc newAsyncSmtp(useSsl = false; debug = false; sslContext: SslContext = nil): AsyncSmtp {...}{.
        raises: [OSError, Exception, SslError, LibraryError, IOError],
        tags: [RootEffect, ReadDirEffect].}

  Creates a new `AsyncSmtp` instance. Source Edit

    proc connect(smtp: AsyncSmtp; address: string; port: Port): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect].}

  Establishes a connection with a SMTP server. May fail with ReplyError or with a socket error. Source Edit

    proc connect(smtp: Smtp; address: string; port: Port) {...}{.
        raises: [OSError, SslError, TimeoutError, ReplyError],
        tags: [ReadIOEffect, TimeEffect, WriteIOEffect].}

  Establishes a connection with a SMTP server. May fail with ReplyError or with a socket error. Source Edit

    proc startTls(smtp: AsyncSmtp; sslContext: SslContext = nil): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect, ReadDirEffect].}

  Put the SMTP connection in TLS (Transport Layer Security) mode. May fail with ReplyError Source Edit

    proc startTls(smtp: Smtp; sslContext: SslContext = nil) {...}{.raises: [SslError,
        OSError, TimeoutError, ReplyError, Exception, LibraryError, IOError],
        tags: [WriteIOEffect, ReadIOEffect, TimeEffect, RootEffect, ReadDirEffect].}

  Put the SMTP connection in TLS (Transport Layer Security) mode. May fail with ReplyError Source Edit

    proc auth(smtp: AsyncSmtp; username, password: string): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect].}

  Sends an AUTH command to the server to login as the `username` using `password`. May fail with ReplyError. Source Edit

    proc auth(smtp: Smtp; username, password: string) {...}{.
        raises: [SslError, OSError, TimeoutError, ReplyError],
        tags: [WriteIOEffect, ReadIOEffect, TimeEffect].}

  Sends an AUTH command to the server to login as the `username` using `password`. May fail with ReplyError. Source Edit

    proc sendMail(smtp: AsyncSmtp; fromAddr: string; toAddrs: seq[string];
                  msg: string): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect].}

  Sends `msg` from `fromAddr` to the addresses specified in `toAddrs`. Messages may be formed using `createMessage` by converting the Message into a string.

  You need to make sure that `fromAddr` and `toAddrs` don't contain any newline characters. Failing to do so will raise `AssertionDefect`.

  Source Edit

    proc sendMail(smtp: Smtp; fromAddr: string; toAddrs: seq[string]; msg: string) {...}{.
        raises: [SslError, OSError, TimeoutError, ReplyError],
        tags: [WriteIOEffect, ReadIOEffect, TimeEffect].}

  Sends `msg` from `fromAddr` to the addresses specified in `toAddrs`. Messages may be formed using `createMessage` by converting the Message into a string.

  You need to make sure that `fromAddr` and `toAddrs` don't contain any newline characters. Failing to do so will raise `AssertionDefect`.

  Source Edit

    proc close(smtp: AsyncSmtp): owned(Future[void]) {...}{.
        raises: [Exception, FutureError], tags: [RootEffect].}

  Disconnects from the SMTP server and closes the socket. Source Edit

    proc close(smtp: Smtp) {...}{.raises: [SslError, OSError], tags: [WriteIOEffect].}

  Disconnects from the SMTP server and closes the socket. Source Edit

# Exports

Port