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smtp 55 mail 33 postfix 20 email 20 imap 9 server 7 mta 7 relay 6 ssmtp 5 mailing 5 sendmail 5 system 5 mailserver 4 webmail 4 dovecot 4 linux 4 mailhog 2 posfix 2 nullmailer 2 mailcatcher 2 exim 2 docker 2 security 2 msmtp 2 dkim 2 mtu 2 smtpd 2 freebsd 2 opensmtpd 2 mailrelay 2 outgoing 2 relayhost 2 smarthost 2 admin 1 mailfilter 1 networking 1 aws 1 network 1 cloud 1 telegram 1