Port 465, 587, 25 on my droplet is blocked, cannot send email to my custumer, please help me!

August 15, 2017 1.4k views
Email Security Ubuntu 16.04

Hello, I have sent some ticket to DO in 3 days ago but no answer. Why blocked my port 465, 25, 587. I use droplet for more 1 year and send email normal but recently I cannot send email to my custumer. DO donot support for anything. Who know how unblock port to send email, please help me. Thanks!

1 comment
  • I use LAMP and set up email server: smtp.zoho.com, 465, ssl, username, password on joomla 3.6.5 I also look up on question and read many article here but donot find what for me.

8 Answers

Ports aren't blocked unless you block them yourself with a firewall. If you're using zoho as your mail provider I suggest you contact them since they're most likely the cause of the issue.

Thank Aprexer!
I checked this for 3 days.

  • Firewall donot do this. I know use Firewall
  • I checked by scan port 465, 587, .., at https://mxtoolbox.com and see those port blocked Please help me!

At least could you give me an IP to scan with?

Hello, Aprexer.
can you help me? Please!

  • Port 465 is blocked inbound but it can send outbound, its a problem with zoho not digitalocean. Also its using zoho to send emails so its nothing to do with your server.

    • Thanks, Aprexer.
      1- I try use SendGrid account to other solution and ERROR :"SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting".
      2- I use account on zoho to send and arrive email then It is Ok. But on my web is "SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting"
      I check all Question and Tutorial about this, but all tell me "Open a ticket to DO". But I send to DO 3 days, they donot answer for me. So I ask my question here.
      I am sory, I use english very badly.

      • Can you provide your full PHPMailer config without the password. Also adding $mail->SMTPDebug = 2; can help you allot in these situations.

        • Thanks for your feedback.
          I install joomla so I donot know about PHPmailer file. Previously, I sended email normal, recently I saw this error in joomla. The error message line is from joomla. I have tried other solutions but port 465, 587 can not send Email. So I donot do WHAT now!

Hello iamzum,

I also have problem like you but my droplet open port 465 & 587 and I use SMTP Plugin with SMTP Zoho but it can't send anyone.

Please help


  • Hello, you use joomla, also. If TRUE then you just add info zoho in admin joomla, you donot need use any plugin.

Hi iamzum,

I am facing the same problem as port 587 is blocked by DO so my web app cannot send outgoing emails. I opened a ticket [Ticket #578581]. But DO support has not replied for a couple days. Ticket is still open unsolved.

Same problem here and same support by DO, I still waiting for a response since 4 days ago... terrible support.

I'm suddenly facing this issue too. It's working fine before it. Waiting for DO support's response too

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