Re: [exim] can send mails with swaks, not with mailx

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Author: Dmitriy Matrosov
Date:  
To: exim-users
Subject: Re: [exim] can send mails with swaks, not with mailx
Your logs contain valid login and password. Also, note, that AUTH LOGIN (as well as AUTH PLAIN) is just base64, so password may be recovered in plain text.

# telnet mail.federcasapescara.it  25
Trying 185.4.142.93...
Connected to mail.federcasapescara.it.
Escape character is '^]'.
220 directadmin30.fastnom.com ESMTP Exim 4.94.2 Wed, 10 Nov 2021 12:17:45
+0100
EHLO test
250-directadmin30.fastnom.com Hello test [213.108.248.159]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPE_CONNECT
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
AUTH LOGIN
334 VXNlcm5hbWU6
bmFzb25lQGZlZGVyY2FzYXBlc2NhcmEuaXQ=
334 UGFzc3dvcmQ6
Tmd1bGFtbWFtbXQxIQ==
235 Authentication succeeded

2021/11/10 11:20:15 Carlo via Exim-users <exim-users@???>:

> hi
> i'm playing with a nas i've installed debian stable on, and i used to
> have some scripts with mailx work to send me messages through external
> providers/servers/etc till i upgraded debian: now i can't send mails
> through mailx but i can through telnet and swaks: here are mailx and
> swaks logs, please treat me as a true noob
>
> echo “Subject: sendmail test” | mail -v troianicarlo@???
> LOG: MAIN
>   <= nasone@??? U=root P=local S=479
> ➜  ~ delivering 1mk3js-0006Jf-IB
> R: smarthost for troianicarlo@???
> T: remote_smtp_smarthost for troianicarlo@???
> Connecting to mail.federcasapescara.it [185.4.142.93]:25 ...  TFO mode
> sendto, no data: EINPROGRESS
> connected
>   SMTP<< 220 directadmin30.fastnom.com ESMTP Exim 4.94.2 Mon, 08 Nov
> 2021 13:27:05 +0100
>   SMTP>> EHLO ilmionasone.fritz.box
>   SMTP<< 250-directadmin30.fastnom.com Hello
> host-95-247-26-164.retail.telecomitalia.it [95.247.26.164]
>          250-SIZE 52428800
>          250-8BITMIME
>          250-PIPELINING
>          250-PIPE_CONNECT
>          250-AUTH PLAIN LOGIN
>          250-STARTTLS
>          250 HELP
>   SMTP>> STARTTLS
>   SMTP<< 220 TLS go ahead
>   SMTP(close)>>
> LOG: MAIN
>   TLS session: (certificate verification failed): delivering
> unencrypted to H=mail.federcasapescara.it [185.4.142.93] (not in
> hosts_require_tls)
> Connecting to mail.federcasapescara.it [185.4.142.93]:25 ...  TFO mode
> sendto, no data: EINPROGRESS
> connected
>   SMTP<< 220 directadmin30.fastnom.com ESMTP Exim 4.94.2 Mon, 08 Nov
> 2021 13:27:05 +0100
>   SMTP>> EHLO ilmionasone.fritz.box
>   SMTP<< 250-directadmin30.fastnom.com Hello
> host-95-247-26-164.retail.telecomitalia.it [95.247.26.164]
>          250-SIZE 52428800
>          250-8BITMIME
>          250-PIPELINING
>          250-PIPE_CONNECT
>          250-AUTH PLAIN LOGIN
>          250-STARTTLS
>          250 HELP
>   SMTP>> MAIL FROM:<nasone@???> SIZE=1515
>   SMTP>> RCPT TO:<troianicarlo@???>
>   SMTP>> DATA
>   SMTP<< 250 OK
>   SMTP<< 550 authentication required
>   SMTP<< 503-All RCPT commands were rejected with this error:
>          503-authentication required
>          503 Valid RCPT command must precede DATA
>   SMTP>> QUIT
>   SMTP(close)>>
> LOG: MAIN
>   ** troianicarlo@??? R=smarthost T=remote_smtp_smarthost
> H=mail.federcasapescara.it [185.4.142.93]: SMTP error from remote mail
> server after RCPT TO:<troianicarlo@???>: 550 authentication
> required
> LOG: MAIN
>   <= <> R=1mk3js-0006Jf-IB U=Debian-exim P=local S=2021
> delivering 1mk3jv-0006Jl-Th
> R: system_aliases for nasone@???
> LOG: MAIN
>   ** nasone@???: Unrouteable address
> LOG: MAIN
>   Frozen (delivery error message)
> LOG: MAIN
>   Completed
>
>
>
> swaks --tls --auth --to segreteria@??? --server
> mail.federcasapescara.it
> Username: nasone@???
> Password: xxx
> === Trying mail.federcasapescara.it:25...
> === Connected to mail.federcasapescara.it.
> <-  220 directadmin30.fastnom.com ESMTP Exim 4.94.2 Mon, 08 Nov 2021
> 22:22:41 +0100
> -> EHLO ilmionasone.fritz.box
> <-  250-directadmin30.fastnom.com Hello
> host-95-247-26-164.retail.telecomitalia.it [95.247.26.164]
> <-  250-SIZE 52428800
> <-  250-8BITMIME
> <-  250-PIPELINING
> <-  250-PIPE_CONNECT
> <-  250-AUTH PLAIN LOGIN
> <-  250-STARTTLS
> <-  250 HELP
> -> STARTTLS
> <-  220 TLS go ahead
> === TLS started with cipher TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128
> === TLS no local certificate set
> === TLS peer DN="/CN=directadmin30.fastnom.com"
> ~> EHLO ilmionasone.fritz.box
> <~  250-directadmin30.fastnom.com Hello
> host-95-247-26-164.retail.telecomitalia.it [95.247.26.164]
> <~  250-SIZE 52428800
> <~  250-8BITMIME
> <~  250-PIPELINING
> <~  250-PIPE_CONNECT
> <~  250-AUTH PLAIN LOGIN
> <~  250 HELP
> ~> AUTH LOGIN
> <~  334 VXNlcm5hbWU6
> ~> bmFzb25lQGZlZGVyY2FzYXBlc2NhcmEuaXQ=
> <~  334 UGFzc3dvcmQ6
> ~> Tmd1bGFtbWFtbXQxIQ==
> <~  235 Authentication succeeded
> ~> MAIL FROM:<root@???>
> <~  250 OK
> ~> RCPT TO:<segreteria@???>
> <~  250 Accepted
> ~> DATA
> <~  354 Enter message, ending with "." on a line by itself
> ~> Date: Mon, 08 Nov 2021 22:21:39 +0100
> ~> To: segreteria@???
> ~> From: root@???
> ~> Subject: test Mon, 08 Nov 2021 22:21:39 +0100
> ~> Message-Id: <20211108222139.028193@???>
> ~> X-Mailer: swaks v20201014.0 jetmore.org/john/code/swaks/
> ~>
> ~> This is a test mailing
> ~>
> ~>
> ~> .
> <~  250 OK id=1mkC6D-000Vj8-Sr
> ~> QUIT
> <~  221 directadmin30.fastnom.com closing connection
> === Connection closed with remote host.
>
> --
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