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imap 17 mail 12 dovecot 9 smtp 9 email 5 mailserver 4 webmail 4 pop3 3 server 3 pop 2 mailing 2 postfix 2 docker 1 iredmail 1 courier 1 mailfilter 1 maildrop 1 saslauthd 1 installer 1 package 1 rspamd 1 sieve 1 mailcow 1 mailstack 1 client 1 rspam 1 mailbox 1 exim 1 mbsync 1 cyrusimap 1 sync 1