What were you trying to do that didn't work?

When executing newaliases command, the /etc/aliases.lmdb file is being created with wrong etc_t context, instead of etc_aliases_t:

# matchpathcon /etc/aliases.lmdb
/etc/aliases.lmdb	system_u:object_r:etc_aliases_t:s0

# rm /etc/aliases.lmdb || true
# newaliases
# ls -Z /etc/aliases.lmdb
unconfined_u:object_r:etc_t:s0 /etc/aliases.lmdb

The reason for this is missing the following rule in policy/modules/contrib/mta.if (mta_filetrans_named_content interface):

mta_etc_filetrans_aliases($1, "aliases.lmdb")

What is the impact of this issue to you?

Need to fix the label using restorecon.

Please provide the package NVR for which the bug is seen:

selinux-policy-40.13.26-1.el10.noarch
Fedora Rawhide as well

How reproducible is this bug?:

Always see above.