Hallo,

ich hoffe das die mailing-list noch aktiv ist und ich hier Hilfe finde.

Ich habe einen ESP8266 mit ESPeasy der mir auf bestimmte Events Emails senden soll. Da er kein TLS beherscht, web.de aber nur gesicherte Verbindungen über port 587 akzeptiert, möchte ich Postfix als SMTP-Relay einsetzen.

Ich habe Postfix auf einem Raspberry installiert und wie folgt konfiguriert:

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first

# line of that file to be used as the name.  The Debian default

# is /etc/mailname.

#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Raspbian)

biff = no

# appending .domain is the MUA's job.

append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

readme_directory = no

# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on

# fresh installs.

compatibility_level = 2

# TLS parameters

smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key

smtpd_use_tls = yes

smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache

smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

#additions 2022-01-09

smtp_enforce_tls = yes

smtp_tls_enforce_peername = no

smtpd_tls_security_level = may

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for

# information on enabling SSL in the smtp client.

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination

myhostname = SmartMeterTS.fritz.box

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

mydestination = $myhostname, SmartmeterTS, SmartMeterTS, localhost.localdomain, localhost

relayhost = smtp.web.de:587

mynetworks = 127.0.0.0/8 192.168.178.30 [::ffff:127.0.0.0]/104 [::1]/128

mailbox_size_limit = 0

recipient_delimiter = +

inet_interfaces = all

# changes 2022-01-09

inet_protocols = ipv4

# additions 2022-01-09

smtp_sasl_auth_enable = yes

sender_canonical_maps = hash:/etc/postfix/sender_canonical

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_sasl_security_options = noanonymous

Die Dateien sasl_passwd und sender_canonical sind angelegt und konvertiert. Die Zugangsdaten darin sind korrekt!

Dennoch scheint die Authentifizierung beii web.de fehlzuschlagen, wenn ich vom Raspi eine Test-email versende:

echo "Das ist der E-Mail Inhalt!" | mail -s "Postfix Test" -a "From: Pi" mihartmann@gmx.de

Auszug aus /var/log/mail.log:

Jan  9 12:32:15 SmartMeterTS postfix/pickup[4506]: 58CB47BCD3: uid=1000 from=<Pi@SmartMeterTS>

Jan  9 12:32:15 SmartMeterTS postfix/cleanup[4515]: 58CB47BCD3: message-id=<20220109113215.58CB47BCD3@SmartMeterTS.fritz.box>

Jan  9 12:32:15 SmartMeterTS postfix/qmgr[4507]: 58CB47BCD3: from=<hartmann-micha@web.de>, size=372, nrcpt=1 (queue active)

Jan  9 12:32:15 SmartMeterTS postfix/smtp[4517]: 58CB47BCD3: to=<mihartmann@gmx.de>, relay=smtp.web.de[213.165.67.124]:587, delay=0.35, delays=0.07/0.12/0.15/0.01, dsn=5.0.0, status=bounced (host smtp.web.de[213.165.67.124] said: 530 Authentication required (in reply to MAIL FROM command))

Jan  9 12:32:15 SmartMeterTS postfix/cleanup[4515]: B09467BCD6: message-id=<20220109113215.B09467BCD6@SmartMeterTS.fritz.box>

Jan  9 12:32:15 SmartMeterTS postfix/bounce[4519]: 58CB47BCD3: sender non-delivery notification: B09467BCD6

Jan  9 12:32:15 SmartMeterTS postfix/qmgr[4507]: B09467BCD6: from=<>, size=2411, nrcpt=1 (queue active)

Jan  9 12:32:15 SmartMeterTS postfix/qmgr[4507]: 58CB47BCD3: removed

Jan  9 12:32:15 SmartMeterTS postfix/smtp[4517]: B09467BCD6: to=<hartmann-micha@web.de>, relay=smtp.web.de[213.165.67.108]:587, delay=0.16, delays=0.01/0/0.14/0.01, dsn=5.0.0, status=bounced (host smtp.web.de[213.165.67.108] said: 530 Authentication required (in reply to MAIL FROM command))

Jan  9 12:32:15 SmartMeterTS postfix/qmgr[4507]: B09467BCD6: removed

Kann mir jemand sagen, wo der Fehler in meiner Konfiguration liegt?

Grüße

Micha