[root@quilmes ~]# swaks --to sconde@deytec.com --from newsletter@abc-consorcio.com.ar
=== Trying mail.deytec.com:25...
=== Connected to mail.deytec.com.
<-  220 drakkar.buen.hosting ESMTP Postfix (Debian/GNU)
 -> EHLO quilmes.buen.hosting
<-  250-drakkar.buen.hosting
<-  250-PIPELINING
<-  250-SIZE 26214400
<-  250-ETRN
<-  250-STARTTLS
<-  250-AUTH DIGEST-MD5 CRAM-MD5 PLAIN LOGIN
<-  250-ENHANCEDSTATUSCODES
<-  250-8BITMIME
<-  250 DSN
 -> MAIL FROM:<newsletter@abc-consorcio.com.ar>
<-  250 2.1.0 Ok
 -> RCPT TO:<sconde@deytec.com>
<-  250 2.1.5 Ok
 -> DATA
<-  354 End data with <CR><LF>.<CR><LF>
 -> Date: Tue, 13 Jun 2017 15:21:02 -0300
 -> To: sconde@deytec.com
 -> From: newsletter@abc-consorcio.com.ar
 -> Subject: test Tue, 13 Jun 2017 15:21:02 -0300
 -> Message-Id: <20170613152102.031320@quilmes.buen.hosting>
 -> X-Mailer: swaks v20170101.0 jetmore.org/john/code/swaks/
 ->
 -> This is a test mailing
 ->
 -> .
<-  250 2.0.0 Ok: queued as A0D6D15A31EB
 -> QUIT
<-  221 2.0.0 Bye
=== Connection closed with remote host.