I forwarded a message to my zimbra account made up of iso-2022 japanese kanji characters I got as spam at another account. It bounced, with the following logs on my zimbra box:

Oct 25 09:54:45 myhost postfix/smtpd[24936]: connect from deleted
Oct 25 09:54:45 myhost postfix/trivial-rewrite[24939]: warning: do not list domain deleted in BOTH mydestination and virtual_mailbox_domains
Oct 25 09:54:55 myhost postfix/smtpd[24936]: 3511527069F: client=deleted
Oct 25 09:54:55 myhost postfix/cleanup[25115]: 3511527069F: message-id=<f70fea205d7.453f3436@deleted>
Oct 25 09:54:55 myhost postfix/qmgr[26181]: 3511527069F: from=<deleted>, size=6400, nrcpt=1 (queue active)
Oct 25 09:54:55 myhost postfix/smtpd[24936]: disconnect from deleted
Oct 25 09:55:00 myhost postfix/smtp[25116]: 3511527069F: to=<myusername@myhost>, relay=[], delay=15, status=sent (250 2.5.0 Ok, id=26376-02, BOUNCE)
Oct 25 09:55:00 myhost postfix/qmgr[26181]: 3511527069F: removed

I did it again twice 5 minutes later and both made it through fine.. can I tell why it bounced initially??