[ingo] filter rule won't delete mails

[Kent Tong]

Hi,

I've created a rule to completely delete mails with [SPAM] in its subject.
It seems to work as I can see a copy of the mail in the Trash folder and
there is a note saying:

  Filter activity: 1 message(s) have been moved to the folder "INBOX.Trash".

However, the mail remains in the inbox. I am using the imap backend. 
With tcpdump I find that this may be caused by a lack of permission
(please see below). However, the user can manually delete mails from
the inbox just fine. As Ingo should be accessing the IMAP server using
that user's credential, this problem just shouldn't happen. The user
has all the permissions in Cyrus (lrswipcda).

Any idea? Thanks for any idea!

17:48:25.079335 IP hoadms003.cpttm.imap2 > hoadms004.cpttm.48746: . ack 426 win
5792 <nop,nop,timestamp 1450045991 87920270>
        0x0000:  4500 0034 e679 4000 4006 d5bc ac12 1334  E..4.y at .@......4
        0x0010:  ac12 1335 008f be6a 0c7a 148b cbb4 fbe0  ...5...j.z......
        0x0020:  8010 16a0 5d9a 0000 0101 080a 566d f227  ....].......Vm.'
        0x0030:  053d 8e8e                                .=..
17:48:25.079580 IP hoadms003.cpttm.imap2 > hoadms004.cpttm.48746: P 1500:1531(31
) ack 426 win 5792 <nop,nop,timestamp 1450045991 87920270>
        0x0000:  4500 0053 e67a 4000 4006 d59c ac12 1334  E..S.z at .@......4
        0x0010:  ac12 1335 008f be6a 0c7a 148b cbb4 fbe0  ...5...j.z......
        0x0020:  8018 16a0 c0ae 0000 0101 080a 566d f227  ............Vm.'
        0x0030:  053d 8e8e 3030 3030 3030 3062 204e 4f20  .=..0000000b.NO.
        0x0040:  5065 726d 6973 7369 6f6e 2064 656e 6965  Permission.denie
        0x0050:  640d                                     d.
17:48:25.080627 IP hoadms004.cpttm.48746 > hoadms003.cpttm.imap2: P 426:444(18)
ack 1531 win 8576 <nop,nop,timestamp 87920270 1450045991>
        0x0000:  4500 0046 7ee6 4000 4006 3d3e ac12 1335  E..F~. at .@.=>...5
        0x0010:  ac12 1334 be6a 008f cbb4 fbe0 0c7a 14aa  ...4.j.......z..
        0x0020:  8018 2180 6f5a 0000 0101 080a 053d 8e8e  ..!.oZ.......=..
        0x0030:  566d f227 3030 3030 3030 3063 2045 5850  Vm.'0000000c.EXP
        0x0040:  554e 4745 0d0a                           UNGE..
17:48:25.081092 IP hoadms003.cpttm.imap2 > hoadms004.cpttm.48746: P 1531:1562(31
) ack 444 win 5792 <nop,nop,timestamp 1450045991 87920270>
        0x0000:  4500 0053 e67b 4000 4006 d59b ac12 1334  E..S.{@. at ......4
        0x0010:  ac12 1335 008f be6a 0c7a 14aa cbb4 fbf2  ...5...j.z......
        0x0020:  8018 16a0 c07c 0000 0101 080a 566d f227  .....|......Vm.'
        0x0030:  053d 8e8e 3030 3030 3030 3063 204e 4f20  .=..0000000c.NO.
        0x0040:  5065 726d 6973 7369 6f6e 2064 656e 6965  Permission.denie
        0x0050:  640d                                     d.
: