Hello, I use Dovecot 2.3.20 on FreeBSD 13.2 (in jail) as a part of iRedMail installation. Some mailboxes are configured for automatic mails processing using sieve (execute :pipe) and a custom binary (started by script). The system was configured and was working correctly during several weeks. Since ~10 days the system starts to work strangely. Some mails cannot be decoded anymore. No changes at our side, no updates etc. I dumped the content received by my binary, and it looks really strange: pOUc9Z33O0GbfzbW5Mrmi 3L4tTlvKfsD8wP+hc6vN1v1bv+Vx827kW+YX5n/Zxtl240erH4t+nNyeuL1zh92O0p24nYKd vbtcd1UVyBdkFwztDtrdsIexJ2/Pu71L914vnFdYto+0T7JvoCiwqGm/7v6d+78UJxf3lHiU 1B9QO7D1wIeD3IO3S91K68rUy/LLPv/E/6m/3Le8oUK/ovAQ7lDWoaeHow63/8z8ubpStTK/ This is a start of one mail. No headers, no readable data. I removed "discard;" from sieve script to put such mails in the mailbox, and the mails look normally: Mime-Version:1.0 Content-Type:multipart/mixed; boundary="=-/3n/zeVGlN5thgeL28RKiw=="
--=-/3n/zeVGlN5thgeL28RKiw== Content-Type: multipart/alternative; boundary="=-sE/MdvfJZlakBmrKkcdzCg==" --=-sE/MdvfJZlakBmrKkcdzCg== Content-Type: multipart/related; boundary="=-cgJVnLNlzX5YuD6yaI5USQ==" --=-cgJVnLNlzX5YuD6yaI5USQ== Content-Transfer-Encoding: base64 Content-Type: text/html; charset=utf-8 etc. Really, I have no idea about any direction to explore. The server is totally under my control, I can do anything, but I have no idea how to debug this situation. I tried to redirect such mails to another mailbox and process them there, but I get the same strange data. If I connect Thunderbird to the mailbox - I can read the mails correctly. So, the problem arrives at the moment when the sieve system is invoked - the mail data is corrupted somehow. Any advise will be really appreciated. Peter
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