Whilst current 3rd party archives suggest my last mail got through, since circa Jul 24 things have failed intermittently until Jul 27 when no more mail is being received by me from this list. It appears the issue is to do with validation of the DNS name of the outbound NSA mail server in that not all the names are listed/exposed in DNS. This then lead to a "disable" for my mailing list account; which ironically for I got the email to which I replied. Not sure if others may be experiencing such issues; which I guess is more of an answer for the admins of this list - are you getting a spike in rejects and/or account disablements? e.g. I will now see: NOQUEUE: reject: RCPT from uphb19pa09.eemsg.mail.mil[214.24.26.83]: 450 4.7.1 <USFB19PA12.eemsg.mail.mil>: Helo command rejected: Host not found; from=<selinux-bounces@xxxxxxxxxxxxx> to=<paul.a.bolton@xxxxxxxxx> proto=ESMTP helo=<USFB19PA12.eemsg.mail.mil> If I then use Google's DNS rather than my own so as to be sure it isn't a local DNS issue... nslookup USFB19PA12.eemsg.mail.mil. 8.8.8.8 Server: 8.8.8.8 Address: 8.8.8.8#53 ** server can't find USFB19PA12.eemsg.mail.mil.: NXDOMAIN others inc. but not limited to: ** server can't find USFB19PA14.eemsg.mail.mil: NXDOMAIN ** server can't find USFB19PA13.eemsg.mail.mil.: NXDOMAIN Some do work: Name: upbd19pa07.eemsg.mail.mil Address: 214.24.27.82 Name: upbd19pa10.eemsg.mail.mil Address: 214.24.27.85 Any thoughts on the resolution. Should I be expected to change my config or should the NSA mail server setup be adjusted to pass these checks? -- Paul ---- http://blog.m0noc.com/ | https://keybase.io/m0noc 4329 E4C5 71F3 58B2 2246 D04D 25DA 39C2 3876 FE3D