[bug][Pigeonhole 0.4.10] Missing msgid

[Alexander Moisseev]

Pigeonhole 0.4.10 doesn't log msgid for some messages.

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