I install Mail Server plugin in my panel. I can receive emails, but when I try to send mail, I get this error message: Theme:Undelivered Mail Returned to Sender when I test with https://www.mail-tester.com/ get this errors

Hello, please check whether the server's port 25 communicates normally, and the normal communication of port 25 is required to send mail.

aapanel_sniper I run sudo ufw status and sudo netstat -tulpn

kohestanimahdi No, no, it just shows that it doesn't work when the system shows that it runs. You must be able to communicate with it. For example, telnet ipaddress 25 can communicate.

kohestanimahdi Hello, check the trash can in your inbox. Have you received any mai

aaPanel_thisyear Hello, No, when I try to send mail, mail returns to my inbox. I check spam and trash in the receiver's email address. I can receive email from my google email, but can not send any mail

kohestanimahdi Please follow the tips of mailtest to improve your information. If your email score is too low, it may be rejected by other inboxes or put in the trash.

zohebnsr Google Cloud Platform don't allow any traffic using port 25, even if we create the firewall rules, or if we try to use SSL or TSL ports. There is NO way! read this : https://cloud.google.com/compute/docs/tutorials/sending-mail

I can not send email

aaP_pcdrips

aaP_pcdrips ![https://i.imgur.com/1XolgJl.png](https://)

![https://i.imgur.com/3W7z6nZ.png](https://)

aaP_pcdrips

Is there a way i can install previous version of aapnel ,Your lvtest upgrde have many issues

aaPanel_Kern

aaP_pcdrips
Hello, check whether the email user and password are correct? try resetting your password
Is it possible to send mail in the Send mail of the mail server?

aaP_pcdrips

aaPanel_Kern upgrade we complined about two issues one was the error occured in login page nd the second was bout emails,You re trying hard to give several suggestions to solve it but none of them solves the issue.

as i said all previous versions worked fine in emails without those issues you are mntioning.Please workhrd to figureout what you hve done to cause such issues.You must ccept the control pnel hve issues nd need to be fixed otherwise dump the latest release until you fix all issues related.

Dont mention bout configurtion because everything is okey but websites cant send emails.

I also sent you the logs you saw whats there.It seems you dont know exactly the reason of those errors in new version,please consider working on it instead of giving unworking solutions.Control panel has issue

aaPanel_Kern

aaP_pcdrips
Hello, can Send mail in the mail server send mail? Any tips? Does the log have any hints?
Does the website use port 25 or port 465 or 587? Have you tried changing your password?

Jefferson_Alexandre

hello, I have this error, I checked that port 25 is blocked to avoid spam, how can we change this port on the mail server?

aaPanel_Kern

Jefferson_Alexandre
Hello, it cannot be changed, all servers use port 25 to transmit mail

aaP_pcdrips

aaPanel_Kern I said configuration is ok and emails can be sent from control panel only but cannot be sent from websites.I mean when i use the mail server to send emvils works fine but email system not working in websites.ll websites cannot send emails,they say emails re sent but no email is being delivered.

Multiple of users are complaining bout emails why dont you consider to find permnent solution??

Jefferson_Alexandre

hello, how do I change the port on the mailserver?, because from what I see port 25 on the server I need to ask support to release it, and I would like to use 587 or 465, I did not find where to make this change, here is the error print when I try send, the password change would be where?

aaPanel_Kern

aaP_pcdrips
Hello, what is the content that the website cannot send prompts? Are the user and password of the email address configured on the website correct? What port is used? Mail can be sent from the mail server, indicating that there is no problem
Don't always say there is no problem, the log prompt is very clear, why can't you give more information?

aaP_pcdrips

aaPanel_Kern

aaP_pcdrips

aaPanel_Kern What is it then?

aaPanel_Kern

aaP_pcdrips
Prompt authentication failed. It is recommended to reset the password of the relevant mailbox user, and then modify the password in the configuration of the website.
Or use mail client software to test whether it is normal?

Jefferson_Alexandre

hello, being able to send messages using SMTP Relay, with data from sendblue, the bad part is that it can send 300 emails a day
https://sendinblue.com/

aaP_Wafik

Some cloud vendors (such as Google, Amazon) close port 25 by default, and you need to contact the vendor to open port 25 before you can use the post office service normally

mehadih31

Some cloud vendors (such as Google, Amazon) close port 25 by default, and you need to contact the vendor to open port 25 before you can use the post office service normally

Facing This issue, How can solve this problem?

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