I can not send email

kohestanimahdi

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

aapanel_sniper

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

kohestanimahdi

aapanel_sniper
I run
sudo ufw status
and
sudo netstat -tulpn

aapanel_sniper

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

aapanel_sniper

aaPanel_thisyear

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

kohestanimahdi

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

aaPanel_Jose

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

I am having same issue. I can receive email, but cannot send them I don't get any error as reply, but it just shows a pop up this error:

"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"

However, I check Port 25 is open and communicating and I am also running ubuntu

aaP_albatrionline1

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

aaP_toolzneeded456

Is this problem unsolveable?

aaPanel_Kern

aaP_toolzneeded456
Hello, please describe your problem in detail. If the server cannot connect to port 25 of other servers, check whether the server provider has disabled port 25

aaP_ssquadram

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 please help

aaPanel_Kern

aaP_ssquadram
hi,
We can't solve this problem. It is recommended to contact the server provider
Or use smtp trunk

aaP_iamshoaib216

I am also face same problem, I received mails but unable to send mail is anybody here to help me

aaPanel_Kern

aaP_iamshoaib216
Hello, can't send email prompt what content?

aaP_iamshoaib216

@aaPanel_Kern Please assist me as you came back need your assistant.

aaP_iamshoaib216

Dear @"aaPanel_Kern" I am using aapanel server My server received mail from other mail but when I try to send mail outside, this shows your message sent successfully but the mail could not reach the given address.

Nov 25 05:33:11 webcarehouse postfix/smtpd[27757]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:19 webcarehouse postfix/smtpd[27751]: warning: hostname net6-ip78.linkbg.com does not resolve to address 87.246.7.78: Name or service not known
Nov 25 05:33:19 webcarehouse postfix/smtpd[27751]: connect from unknown[87.246.7.78]
Nov 25 05:33:20 webcarehouse postfix/smtpd[28724]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: Connection lost to authentication server
Nov 25 05:33:20 webcarehouse postfix/smtpd[28724]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:22 webcarehouse postfix/smtpd[27600]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
Nov 25 05:33:22 webcarehouse postfix/smtpd[27600]: connect from unknown[87.246.7.227]
Nov 25 05:33:29 webcarehouse postfix/smtpd[27600]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 25 05:33:29 webcarehouse postfix/smtpd[27751]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 25 05:33:29 webcarehouse postfix/smtpd[27751]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:30 webcarehouse postfix/smtpd[27600]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:37 webcarehouse postfix/smtpd[27757]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
Nov 25 05:33:37 webcarehouse postfix/smtpd[27757]: connect from unknown[87.246.7.227]
Nov 25 05:33:38 webcarehouse postfix/smtpd[28724]: warning: hostname net6-ip78.linkbg.com does not resolve to address 87.246.7.78: Name or service not known
Nov 25 05:33:38 webcarehouse postfix/smtpd[28724]: connect from unknown[87.246.7.78]
Nov 25 05:33:39 webcarehouse postfix/smtpd[27751]: connect from unknown[141.98.10.153]
Nov 25 05:33:39 webcarehouse postfix/smtpd[27751]: disconnect from unknown[141.98.10.153] quit=1 commands=1
Nov 25 05:33:43 webcarehouse dovecot: auth: Warning: auth client 0 disconnected with 1 pending requests: Connection reset by peer
Nov 25 05:33:48 webcarehouse postfix/smtpd[27757]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 25 05:33:49 webcarehouse postfix/smtpd[27600]: connect from unknown[141.98.10.153]
Nov 25 05:33:49 webcarehouse postfix/smtpd[28724]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 25 05:33:49 webcarehouse postfix/smtpd[27757]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:50 webcarehouse postfix/smtpd[28724]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
Nov 25 05:33:52 webcarehouse postfix/smtpd[27751]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
Nov 25 05:33:52 webcarehouse postfix/smtpd[27751]: connect from unknown[87.246.7.227]
Nov 25 05:33:55 webcarehouse postfix/smtpd[27600]: warning: unknown[141.98.10.153]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

aaP_iamshoaib216

Dear @aaPanel_Kern I am using aapanel server My server received mail from other mail but when I try to send mail outside, this shows your message sent successfully but the mail could not reach the given address.

aaPanel_Kern

aaP_iamshoaib216
Prompt: SASL LOGIN authentication failed
Check whether the email account password is correct. You are advised to reset the password once