Hello,
Having a grave problem with recently compiled Exim 4.90.1 (running on
Ubuntu 16.04 64bit).
Primary domain: example.com
In /etc/aliases:
user: user1@???,user2@???
When I run command like
exim -bt user@???
Exim prints correct MX records for every particular address the above
recipient forwards mail to. However, when I try actually send message to
the above, I see something like below in main.log:
2018-03-19 20:46:59 1exv5t-0003k7-NV ** user1@???
<user@???> R=dnslookup T=remote_smtp H=example.net [69.73.xx.xx]
X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no: SMTP error from remote
mail server after RCPT TO:<user1@???>: 550-Please turn on SMTP
Authentication in your mail client.\n550-mail.example.com
(mail2016.example.com) [52.45.xx.xx]:49156\n550 is not permitted to
relay through this server without authentication.
(attempts to send mail to A records instead of any of MX)
DNS lookup router is pretty much standard:
dnslookup:
driver = dnslookup
domains = ! +local_domains
transport = remote_smtp
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
no_more
The host in A record doesn't process incoming mail for the domain in
question (in the above sample, example.net), thus delivery fails.
The above doesn't happen if I use Exim 4.87, and happens quite often if
I use 4.90.1
Is it a known issue? DNS resolver works without problem, I checked that
before sending yet another mail that failed in the above manner.
I would appreciate pieces of advice on how to handle this. Thank you.
Beat regards,
Konstantin
