• Hantering av paketpris

Definitioner

1. MTA: Mail Transport Agent

   A Mail Transport Agent (MTA) transports email messages between hosts using SMTP. A message may involve several MTAs as it moves to its intended destination.

   1. Postfix
   2. Sendmail
2. SMTP: Simple Mail Transfer Protocol

   är det vanligaste kommunikationsprotokollet för att leverera elektronisk post. Den ursprungliga specifikationen av protokollet skriven av Jonathan B. Postel 1982 (RFC 821) var i kraft till 2001, med ett antal utökningar.

3. SASL: Simple Authentication Security Layer

   is a framework for authentication and data security in Internet protocols

   1. Cyrus SASL
   2. Dovecot SASL
   postconf -a (SASL support in the SMTP server)

   postconf -A (SASL support in the SMTP+LMTP client)

4. LMTP Local Mail Transfer Protocol

   https://en.wikipedia.org/wiki/Local_Mail_Transfer_Protocol

   The Local Mail Transfer Protocol (LMTP) is a derivative of ESMTP, the extension of the Simple ... LMTP, on the other hand, can indicate success or failure to the client for each recipient, allowing the client to handle the queueing instead.

5. TLS: Transport Layer Security

   The TLS protocol aims primarily to provide privacy and data integrity between two communicating computer applications

6. AUTH:SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol whereby an SMTP client may log in using an authentication mechanism chosen among those supported by the SMTP server. The authentication extension is mandatory for submission servers.
7. SLL Secure Sockets Layer Secure Sockets Layer (SSL) är en säkerhetsmekanism som uppfanns till Netscape och användes för att kryptera kommunikationen mellan två enheter. Numera har SSL ersatts av Transport Layer Security (TLS) för att åtgärda de säkerhetsbrister som finns i SSL. Så ofta används SSL som synonym för TLS
8. LDAP: Lightweight Directory Access Protocol (LDAP) definierar ett protokoll och en datamodell för kommunikation med en katalogtjänst. LDAP skapades av Tim Howes,

1. yum install cyrus-sasl-plain

   yum install cyrus-imapd cyrus-sasl cyrus-sasl-plain

   https://cyrusimap.org/imap/download/installation/distributions/fedora.html

   # passwd cyrus

   /bin/systemctl start saslauthd.service

   systemctl enable saslauthd

   testsaslauthd -u cyrus -p YOUR-PASSWORD

   systemctl start cyrus-imapd

   systemctl enable cyrus-imapd

2. https://www.server-world.info/en/note?os=Fedora_27&p=mail&f=1
3. https://support.plesk.com/hc/en-us/articles/213388269-Unable-to-send-mail-using-STARTTLS-authentication-4-7-0-TLS-not-available-due-to-local-problem
4. ~]# alternatives --config mta
5. /etc/postfix/sasl_passwd

   mailout.privat.bahnhof.se E4747:cvxxxxxx