We have spent hours to find out what happen to not receiving any emails recently. So quiet so good, there is no happy new year greeting mail from ourselves. Hold on, it doesn’t make sense. Yes, we have found the SMTP port 25 is blocked, totally blocked, confirmed by oracle cloud : Outbound SMTP is blocked.
BLOCKED, UNBELIEVABLE
Impossible to fix it by yourself
You may try to fix it like your router/gateway. NO, this is not the way you think it is. There are 3 layers or more firewalls on each gateway. Only the 2 viewable firewalls you can change or modify it, the rest is oracle maintain/control. Simply to network structure below:
Your Machine/instance
|
Your security list or Network security groups (NSGs)
(Networking > Virtual Cloud Networks > vcn-######)
|
Oracle Cloud Global Firewall
|
Internet
Solution?
Options are limited, we have tried the following, let’s see which one is not crossed.
Fix by yourself to config the security listcontact via support email to request an exemption- contact via open a service limits request to request an exemption
Service Limit Request
The “Request limit increase” locates at the bottom of the help/support side window.
You will find yourself need to upgrade to a paid account in order to submit a service limits request. (Not sure if you can do via live chat during your first 30 days free trial without an upgrade.)
After chooise PAYG plan, key in your information, and oracle checked (maybe), your card will be charged $100 bucks, and oracle said they will automatically transfer back. THEY SAID.
The paid account upgrade takes longer than expected, and it looks like they don’t wanna take your money, but your card details. (Remember how do they check your id in their big data with your tiny credit card – still in fresh memory. )
A long wait… 6 hours converted account to a paid account.