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smtp 55 mail 33 postfix 20 email 20 imap 9 server 7 mta 7 relay 6 sendmail 5 system 5 ssmtp 5 mailing 5 mailserver 4 webmail 4 linux 4 dovecot 4 mailcatcher 2 exim 2 nullmailer 2 docker 2 security 2 msmtp 2 dkim 2 mtu 2 freebsd 2 smtpd 2 opensmtpd 2 mailrelay 2 outgoing 2 relayhost 2 smarthost 2 mailhog 2 posfix 2 telegram 1 forwarder 1 Spamassassin 1 raspberry 1 pipeline 1 STARTLS 1 mailcow 1