Mail-crypt won't encrypt emails

[Serveria Support]

Hi, 

We're running Dovecot 2.2.36 and we need to set up the mail-crypt plugin
to encrypt all incoming and outgoing emails. Outgoing emails seem to get
encrypted fine but the incoming ones don't. We tried everything
including this config: 

mail_attribute_dict = file:%h/Maildir/dovecot-attributes
mail_plugins = $mail_plugins mail_crypt

plugin {
mail_crypt_global_private_key = <ecprivkey.pem
 mail_crypt_global_public_key = <ecpubkey.pem 
 mail_crypt_save_version = 2 

} 

also this one: 

plugin { 

mail_crypt_curve = prime256v1 

mail_crypt_save_version = 2 

} 

but to no avail. There are no visible errors, Dovecot restarts fine and
outgoing emails get encrypted. Any ideas? 
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