Ich habe Sendmail installiert und habe das Folgende in sendmail.mc eingefügt.
define(`SMART_HOST',`[mail.gmx.net]')dnl
define(`RELAY_MAILER_ARGS', `TCP $h 587')dnl
define(`ESMTP_MAILER_ARGS', `TCP $h 587')dnl
define(`confAUTH_OPTIONS', `A p')dnl
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
FEATURE(`authinfo',`hash -o /etc/mail/authinfo/smtp-auth.db')dnl
versucht mit
echo "Subject: sendmail test" | sendmail -v name@gmx.at
name@gmx.at... Connecting to [127.0.0.1] via relay...
220 localhost.localdomain ESMTP Sendmail 8.17.1.9/8.17.1.9/Debian-2; Wed, 18 Oct 2023 18:09:40 +0200; (No UCE/UBE) logging access from: localhost.localdomain(OK)-localhost.localdomain [127.0.0.1]
>>> EHLO localhost.localdomain
250-localhost.localdomain Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-EXPN
250-VERB
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH DIGEST-MD5 CRAM-MD5
250-DELIVERBY
250 HELP
>>> VERB
250 2.0.0 Verbose mode
>>> MAIL From:<mkx@localhost.localdomain> SIZE=23 AUTH=mkx@localhost.localdomain
250 2.1.0 <mkx@localhost.localdomain>... Sender ok
>>> RCPT To:<name@gmx.at>
>>> DATA
250 2.1.5 <name@gmx.at>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
050 <name@gmx.at>... Connecting to mail.gmx.net. port 587 via relay...
050 220 gmx.net (mrgmx104) Nemesis ESMTP Service ready
050 >>> EHLO localhost.localdomain
050 250-gmx.net Hello localhost.localdomain [213.142.96.52]
050 250-8BITMIME
050 250-SIZE 69920427
050 250 STARTTLS
050 >>> STARTTLS
050 220 OK
050 >>> EHLO localhost.localdomain
050 250-gmx.net Hello localhost.localdomain [213.142.96.52]
050 250-8BITMIME
050 250-AUTH LOGIN PLAIN
050 250 SIZE 69920427
050 >>> AUTH PLAIN cm9vdAByZWRkZWJAZ214LmF0ACdxN35DdiZpMExAJzNpeU9SNSlJ
050 235 Authentication succeeded
050 >>> MAIL From:<mkx@debian> SIZE=319 AUTH=<>
050 550-Requested action not taken: mailbox unavailable
050 550 invalid DNS MX or A/AAAA resource record
050 /home/mkx/.forward: line 1: forwarding to name@gmx.at
050 name@gmx.at... Using cached ESMTP connection to mail.gmx.net. via relay...
050 >>> RSET
050 250 OK
050 >>> MAIL From:<>
050 550-Requested action not taken: mailbox unavailable
050 550 Sender address is not allowed.
050 MAILER-DAEMON... aliased to postmaster
050 postmaster... aliased to root
050 root... aliased to mkx
050 /home/mkx/.forward: line 1: forwarding to name@gmx.at
050 postmaster... aliased to root
050 root... aliased to mkx
050 /home/mkx/.forward: line 1: forwarding to name@gmx.at
050 name@gmx.at... Using cached ESMTP connection to mail.gmx.net. via relay...
050 >>> RSET
050 250 OK
050 >>> MAIL From:<>
050 550-Requested action not taken: mailbox unavailable
050 550 Sender address is not allowed.
050 MAILER-DAEMON... aliased to postmaster
050 postmaster... aliased to root
050 root... aliased to mkx
050 /home/mkx/.forward: line 1: forwarding to name@gmx.at
050 MAILER-DAEMON... Saved message in /var/lib/sendmail/dead.letter
250 2.0.0 39IG9eib034123 Message accepted for delivery
name@gmx.at... Sent (39IG9eib034123 Message accepted for delivery)
Closing connection to [127.0.0.1]
>>> QUIT
221 2.0.0 localhost.localdomain closing connection
Habe hier einen Fehler.
050 550-Requested action not taken: mailbox unavailable
050 550 invalid DNS MX or A/AAAA resource record