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Full Discussion: unix-mail to external websites/addresses
Top Forums UNIX for Dummies Questions & Answers unix-mail to external websites/addresses Post 302094974 by BOFH on Thursday 2nd of November 2006 10:16:19 AM
Old 11-02-2006
In general you should be able to send a message to any server that accepts the incoming connection. You can see that it's working for local servers. Configuration issues at either server or in between can prevent the successful delivery of your message.

For example, if your unix server isn't in DNS and the ParentCompany server will only accept e-mail from DNS resolvable systems, your incoming connection will not be accepted.

Many viruses set up a mini smtp server on the Windows workstation which churns out spam/virus e-mails. I've configured our network to refuse to allow port 25 connections from any workstation not specifically configured as a mail transfer agent.

You can test these by attempting a connection manually

Code:
$ telnet parentcompany.com 25

If you don't get anything (generally a banner of some sort is displayed), you're probably being blocked at your local company firewall. If you get a banner, you can try to build a session and see what happens:

Code:
$ telnet parentcompany.com 25
220 mail.parentcompany.com ESMTP Postfix
HELO abccompany.com
250 Hello abccompany.com
MAIL FROM: <joy.k@abccompany.com>
250 Ok
RCPT TO: <my.friend@parentcompany.com>
250 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: Example Message
From: joy.k@abccompany.com
To: my.friend@parentcompany.com

Yo,

Sending a test message.

  Later,
Joy
.
250 Ok: queued as 45334
QUIT
221 Bye

The lines that begin with numbers are server responses. The other lines are what you're typing.

You should get either something like the above session, or you might receive an error.

In both of these situations, the best way to resolve this is to configure your server to route e-mail through your local MTA and let it deliver e-mail. You'll have to check your e-mail server's configuration to see what the options are to make this setting.

Carl
 

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LEARN ABOUT DEBIAN

calibre-smtp

CALIBRE-SMTP(1) 						      calibre							   CALIBRE-SMTP(1)

NAME

       calibre-smtp - part of calibre

SYNOPSIS

       calibre-smtp  [options] [from to text]

DESCRIPTION

       Send  mail using the SMTP protocol. calibre-smtp has two modes of operation. In the compose mode you specify from to and text and these are
       used to build and send an email message. In the filter mode, calibre-smtp reads a complete email message from STDIN and sends it.

       text is the body of the email message.  If text is not specified, a complete email message is read from STDIN.  from is the  email  address
       of the sender and to is the email address of the recipient. When a complete email is read from STDIN, from and to are only used in the SMTP
       negotiation, the message headers are not modified.

       Whenever you pass arguments to calibre-smtp that have spaces in them, enclose the arguments in quotation marks.

OPTIONS

       --version
	      show program's version number and exit

       -h, --help
	      show this help message and exit

       -l, --localhost
	      Host name of localhost. Used when connecting to SMTP server.

       -o, --outbox
	      Path to maildir folder to store failed email messages in.

       -f, --fork
	      Fork and deliver message in background. If you use this option, you should also use --outbox to handle delivery failures.

       -t, --timeout
	      Timeout for connection

       -v, --verbose
	      Be more verbose

   COMPOSE MAIL
       Options to compose an email. Ignored if text is not specified

       -a, --attachment
	      File to attach to the email

       -s, --subject
	      Subject of the email

   SMTP RELAY
       Options to use an SMTP relay server to send mail. calibre will try to send the email directly unless --relay is specified.

       -r, --relay
	      An SMTP relay server to use to send mail.

       --port Port to connect to on relay server. Default is to use 465 if encryption method is SSL and 25 otherwise.

       -u, --username
	      Username for relay

       -p, --password
	      Password for relay

       -e, --encryption-method
	      Encryption method to use when connecting to relay. Choices are TLS, SSL and NONE. Default is TLS. WARNING: Choosing NONE	is  highly
	      insecure

SEE ALSO

       The User Manual is available at http://manual.calibre-ebook.com

       Created by Kovid Goyal <kovid@kovidgoyal.net>

calibre-smtp (calibre 0.8.51)					   January 2013 						   CALIBRE-SMTP(1)
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