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Full Discussion: Sendmail Fails to send emails from Linux server.
Top Forums Shell Programming and Scripting Sendmail Fails to send emails from Linux server. Post 303003286 by drysdalk on Monday 11th of September 2017 05:17:50 PM
Old 09-11-2017
Hi,

Sorry for the delay in replying - glad you've gotten your Sendmail config generating correctly now at least. I'm afraid I can't really help you much further though, sorry. I've got no experience myself in setting up Sendmail to do what you're trying to do, as I've never had to set up a Sendmail box to do quite what you're trying to do.

From some Googling it seems it's certainly possible to get Sendmail to talk to an MSA rather than an MTA and authenticate against it using the authinfo mechanism previously discussed, but as you say you might need to get TLS and other things besides working for this to operate correctly. Perhaps others who have gone down this road and are reading this thread could advise you on how to proceed, if this is really something you absolutely have to do.

On that subject, though: again, is there a reason you have to do this, and pass the mail on to a server that is normally used for talking to mail clients and whatnot ? Why can't you just straight send this mail to its correct destination from your local server, without a relay or smart host or anything else in the way ? Or alternatively, is there not a mail server on site that already is set up to do e-mail correctly that you can just use as your smart relay, saving yourself all this trouble ?
 

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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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