Since I enabled postscreen (with soft_bounce=yes in master.cf) I was
getting logs of this form:
Apr 9 01:08:12 mta1 postfix/postscreen[18326]:
NOQUEUE: reject: RCPT from [2607:f8b0:4002:c05::22d]:32999:
450 4.3.2 Service currently unavailable;
from=<redac...@gmail.com>, to=<REDACTED>,
proto=ESMTP, helo=<mail-yw0-x22d.google.com>
linefeeds added by me for readability.
gmail would just keep trying a half hour later and mail never gets
delivered.
rfc3463 isn't very helpful:
X.3.2 System not accepting network messages
The host on which the mailbox is resident is not accepting
messages. Examples of such conditions include an immanent
shutdown, excessive load, or system maintenance. This is
useful for both permanent and permanent transient errors.
I have lines of the form:
main.cf:
postscreen_access_list =
cidr:$config_directory/postscreen_access
hash:$config_directory/postscreen_reject
postscreen_access:
# google mail servers
2607:f8b0:4002:c00::/60 permit
[... other google server blocks ...]
This is a workaround that shouldn't be needed.
Any idea what the cause of this is? So far no legit mail except gmail
gets caught here.
Curtis
