[bug][Pigeonhole 0.4.10] Missing msgid

Pigeonhole 0.4.10 doesn't log msgid for some messages.

Dec 16 09:57:57 mx dovecot: lmtp(user1@example.com): EbLlL2gLcVYCBgEAPZa6/Q: sieve: msgid=20151216065756.BE1DF1FFD8@cp.bitrix24.com: forwarded to user3@example.com Dec 16 09:57:57 mx dovecot: lmtp(user1@example.com): EbLlL2gLcVYCBgEAPZa6/Q: sieve: stored mail into mailbox 'INBOX' Dec 16 09:57:57 mx dovecot: lmtp(user2@example.com): FrLlL2gLcVYCBgEAPZa6/Q: sieve: msgid=20151216065756.C77BB1FFD8@cp.bitrix24.com: forwarded to user3@example.com Dec 16 09:57:57 mx dovecot: lmtp(user2@example.com): FrLlL2gLcVYCBgEAPZa6/Q: sieve: msgid=20151216065756.C77BB1FFD8@cp.bitrix24.com: stored mail into mailbox 'bitrix'