failure sending email to a local smtp server

sejtam · Mon Jan 05, 2015 10:11 am

I have

[admin@koerberGW] /tool e-mail> /ip address print
Flags: X - disabled, I - invalid, D - dynamic
 #   ADDRESS            NETWORK         INTERFACE
 0   A.B.C.D/24 103.247.134.0   G1-world
 1   ;;; Loopback bridge
     127.0.0.2/32       127.0.0.2       bridge-loopback
 2   192.168.88.1/24    192.168.88.0    bridge-local
 3   192.168.0.233/24   192.168.0.0     bridge-local
 4   ;;; hotspot network
     192.168.100.1/24   192.168.100.0   ether7-Hotspot
 5 X 192.168.0.234/24   192.168.0.0     G2
 6   192.168.30.1/24    192.168.30.0    VLAN-30

note the two addresses on bridge-local !

my email setup looks like this:

 /tool e-mail> print
      address: 192.168.0.10
         port: 587
    start-tls: yes
         from: GW <admin@me>
         user: admin@me
     password: password
  last-status: failed

when I try to send an email, I get this:

16:03:45 firewall,info OUTPUT output: in:(none) out:(unknown), proto TCP (SYN), 127.0.0.1:59792->127.0.0.1:587, len 60
16:03:45 firewall,info OUTPUT output: in:(none) out:(unknown), proto TCP (ACK,RST), 127.0.0.1:587->127.0.0.1:59792, len 40

The routing table looks like this:

] /ip route> print
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 A S  0.0.0.0/0                          192.168.0.1               1
 1 X S  0.0.0.0/0                          A.B.C.D            1
 2  DC  A.B.C.D/24   A.B.C.D G1-world                255
 3 ADC  127.0.0.2/32       127.0.0.2       bridge-loopback           0
 4 ADC  192.168.0.0/24     192.168.0.234   bridge-local              0
 5  DC  192.168.30.0/24    192.168.30.1    VLAN-30            255
 6 ADC  192.168.88.0/24    192.168.88.1    bridge-local              0
 7  DC  192.168.100.0/24   192.168.100.1   ether7-Hotspot          255

Note the route #4. I disabled that address from the G2 interface (see above), yet that route is still present and
apparently can be set 'disabled' since it's dynamic.

Still, that does also not explain why the RB2011 is trying to send the email from source-address 127.0.0.2 !

any insights anyone?

sejtam · Wed Jan 07, 2015 5:41 pm

Ok. i worked this out. for a while I had two addreses in 192.168.0.0/24 bound to the bridge-local interface (192.168.0.233 and .234)

Apparently the routing rememberd .234 as the preferred source, even after I removed that address (and only .233 was left).

I had to remove the .233 address also and re-add it, so that the routing then learnt .233 as pref-src.

After that also the FTP issue I mentioned in a separate thread went away

failure sending email to a local smtp server

failure sending email to a local smtp server

Re: failure sending email to a local smtp server