Email Server Messages to Yahoo and Hotmail fails and returns Undelivered. Any help please

Hello guys, please i need help.

i have configured my Mail server but whenever i try to send messages to Yahoo or Hotmail i get a return error Message Undelivered.

Gmail works fine.

How do i solve this problem please?

sending from mail client ? or rainloop or you use gmail then use server smtp ??

am using PHPMailer on my website to send messages

already do troubleshoot ?

first
try everything from home

sent and received email from rainloop

just did

this is what am getting

This is the mail system at host mobileunlocksgh.com.

I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

               The mail system

maxwellkobinagyamfi@hotmail.com: host
hotmail-com.olc.protection.outlook.com[104.47.55.33] said: 550 5.7.1
Unfortunately, messages from [my-ip-address] weren’t sent. Please contact
your Internet service provider since part of their network is on our block
list (S3140). You can also refer your provider to
Troubleshooting.
[MW2NAM10FT028.eop-nam10.prod.protection.outlook.com] (in reply to MAIL
FROM command)

check your IP Blacklist at mxtoolbox

this is what i get => Blacklisted by UCEPROTECTL3

how do i solve this please?

I think this is a problem with DigitalOcean. Am moving my server to Vultr

contact your provider to do something with that ip …

i have many ip’s whitelist already…100%clean… the provider that i use
but im at indonesia… i cannot figure out how to trade with you lol

Can you please check your ip here Email Blacklist Check - IP Blacklist Check - See if your server is blacklisted

Blacklisted by UCEPROTECTL3

this is a common issue with Digital Ocean from all what i have read online.

Am doing a backup then delete my droplet.

moving to Vultr

1 Like

Try to obtain new IP address from Digital Ocean and check its blacklisted status. If clean, you can continue with Digital Ocean.
Usually due to some users who abuse the IP address with spam mails, the IP range gets blacklisted.

And yes, Vultr is a good choice.

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