The new SES dedicated IP is _and has always been_ timing out ...

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Since some of the shared IPs are blacklisted, we requested a dedicated IP to mitigate the risk of our mail being interrupted. (Notes:

  • postfix config, sasl auth, routing... are ok
  • the Amazon shared IPs (+direct transfer +other relays) work fine
  • there is no firewall for outgoing traffic
  • our server IP is fixed and the Internet has been working fine there for many years)

However the dedicated IP is constantly timing out, it actually has never been available (we started using it 8 hours ago)

postfix/relay/smtp[8512]: connect to 69.xx.yy.zz[69.xx.yy.zz]:587: Connection timed out

# telnet 69.xx.yy.zz 587
Trying 69.xx.yy.zz...
telnet: Unable to connect to remote host: Connection timed out

(same for ports 465, and the restricted 25)

# traceroute 69.xx.yy.zz
traceroute to 69.xx.yy.zz (69.xx.yy.zz), 30 hops max, 60 byte packets
 1  139.x.y.z (139.x.y.z)  0.949 ms  0.669 ms  1.208 ms
 2  some-server.domain.com (139.a.b.c)  0.529 ms some-other-server.domain.com (139.a.b.d)  0.563 ms  0.540 ms
 3  decix1.amazon.com (80.81.194.152)  3.518 ms some-third-server.domain.com (139.a.b.e)  0.489 ms  0.462 ms
 4  decix1.amazon.com (80.81.194.152)  3.465 ms  3.447 ms *
 5  * * *
 6  * * *

Clearly the problem is on Amazon end. What to do from here? (we don't want to subscribe to the technical support for a problem which is out of our hands)

Asterix
asked 2 years ago263 views
1 Answer
1
Accepted Answer

Dedicated IPs host SMTP clients, not SMTP servers. They originate outgoing mail for a single tenant so that tenant's reputation is not blemished by the actions of other mail originators. It you want to test that your mail is being originated on your dedicated IP, look at the Received: headers of mail you send via SES.

answered 2 years ago
  • Thank you very much for your clarification. That makes a lot of sense.

    Are there some specific adjustment to perform on our server, compared to using a shared IP?

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