postfix sasl denials

[Natxo Asenjo]

hi,

when trying to relay e-mail using SASL authentication on a ipa centos
domain I get this this on audit.log:

type=AVC msg=audit(1395749719.107:875): avc:  denied  { unlink } for
pid=4229 comm="smtpd" name="smtp_89" dev=dm-0 ino=265669
scontext=unconfined_u:system_r:postfix_smtpd_t:s0
tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=file
type=AVC msg=audit(1395749719.109:876): avc:  denied  { getattr } for
pid=4229 comm="smtpd" path="/var/tmp/smtp_89" dev=dm-0 ino=265669
scontext=unconfined_u:system_r:postfix_smtpd_t:s0
tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=file
type=AVC msg=audit(1395749719.109:877): avc:  denied  { unlink } for
pid=4229 comm="smtpd" name="smtp_89" dev=dm-0 ino=265669
scontext=unconfined_u:system_r:postfix_smtpd_t:s0
tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=file
type=AVC msg=audit(1395749719.110:878): avc:  denied  { getattr } for
pid=4229 comm="smtpd" path="/var/tmp/smtp_89" dev=dm-0 ino=265669
scontext=unconfined_u:system_r:postfix_smtpd_t:s0
tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=file


de local user postfix is indeed id 89. In /var/tmp/smtp_89 I have the
kerberos ticket that the relay server is using
(smtp/testsmtprelay.sub.domain.tld at SUB.DOMAIN.TLD)

$ sudo ls -Z /var/tmp/
-rw-------. root    root    system_u:object_r:krb5_host_rcache_t:s0 host_0
-rw-------. postfix postfix unconfined_u:object_r:user_tmp_t:s0 smtp_89

if i set selinux in permissive mode, I may relay using sasl, otherwise it
gets blocked.

Any clues on how to fix this to keep selinux enabled?

TIA,

--
Groeten,
natxo
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