| Mail (Ubuntu Server)
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Dovecot:
UCR variable: mail/dovecot/auth/allowplaintext=true
To enable plain communication without SSL I change the config file of dovecot on the server. /etc/dovecot/conf.d/10-ssl.conf
ssl = no
and added
disable_plaintext_auth = no
Google gmail attempt:
"The recipient server did not accept our requests to connect"
"unable to read banner"
"smtp; The recipient server did not accept our requests to connect."
My email server uses both Postfix as an MTA (Mail Transfer Agent) and Dovecot
as an MDA (Mail Delivery Agent).
The MTA transfers mail from computer to computer.
The MDA is responsible for delivering emails to local recipients' mailboxes on
a server.
OR
Delivering mail to mail clients like Evolution or Thunderbird.
"telnet mail.ary.com 25"
This should be the conversation
S: 220 smtp.example.com ESMTP Postfix
C: HELO relay.example.org
S: 250 Hello relay.example.org, I am glad to meet you
C: MAIL FROM:
S: 250 Ok
C: RCPT TO:
S: 250 Ok
C: RCPT TO:
S: 250 Ok
C: DATA
S: 354 End data with .
C: From: "Bob Example"
C: To: "Alice Example"
C: Cc: theboss@example.com
C: Date: Tue, 15 Jan 2008 16:02:43 -0500
C: Subject: Test message
C:
C: Hello Alice.
C: This is a test message with 5 header fields and 4 lines in the message body.
C: Your friend,
C: Bob
C: .
S: 250 Ok: queued as 12345
C: QUIT
S: 221 Bye
{The server closes the connection}
=======================================================
telnet mail.port25.com 25
Trying 69.63.149.30...
Connected to mail.port25.com (69.63.149.30).
Escape character is '^]'.
220 mail.port25.com (PowerMTA(TM) v4.0) ESMTP service ready
EHLO server.example.com
250-mail.port25.com says hello
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250-8BITMIME
250-XACK
250-XMRG
250-SIZE 54525952
250-VERP
250 DSN
MAIL FROM:
250 2.1.0 MAIL ok
RCPT TO:
250 2.1.5 ok
DATA
354 send message
From: "John Smith"
To: "Jane Doe"
Subject: test message sent from manual telnet session
Hello World,
.
250 2.6.0 message received
QUIT
221 2.0.0 mail.port25.com says goodbye