Eu configurei o servidor de e-mail para pequenas empresas com Ubuntu 16.04, Postfix, (usuários virtuais) Dovecot, Amavis-new, Sieve para Junk mail movendo para Junk folder e fetchmail com rápido tempo de busca (4sec). Dois meses até agora tudo bem, trabalhando muito bem. Duas semanas atrás eu chequei os logs como de costume para erro, atividade de spamfilter, atividade de hackers etc e notei esse erro:
Nov 18 16:37:12 server dovecot: imap([email protected]): Error: Corrupted index cache file /var/mail/vhosts/server.com/mail/dovecot.index.cache: Broken MIME parts for mail UID 420 in mailbox INBOX: Cached MIME parts don't match message during parsing: Cached header size mismatch (parts=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)
(o endereço de e-mail é alterado, é claro)
Hoje eu verifiquei novamente e recebi esse erro novamente. Até onde eu descobri é que isso pode ser o problema do Dovecot com o Sieve. Alguém tem experiência com isso? Isso pode resultar em corrupção de email? Eu encontrei casos em que o cliente de email está causando isso. Tanto quanto eu sei Outlook (eu não sei versão) e iphone é usado.