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

    10 days later

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

      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

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

          Dear @aaPanel_Kern I have reset the mail password and tried to send it again but face the same issue My server allows me to send mail on another mail present on the same server, but don't send mail outside the server other mails. Kindly check the logs I have attached below and inform me. I shall be very thankful to you for your kindness.

          Nov 26 08:45:53 webcarehouse postfix/cleanup[53293]: 4CC8A42190D: message-id=-------------@webcare.localdomain
          Nov 26 08:45:53 webcarehouse postfix/qmgr[2317]: 4CC8A42190D: from=info@mail.com, size=765, nrcpt=1 (queue active)
          Nov 26 08:45:56 webcarehouse postfix/bounce[53557]: warning: /etc/postfix/main.cf, line 68: overriding earlier entry: relayhost=
          Nov 26 08:45:56 webcarehouse postfix/smtp[53169]: 4CC8A42190D: to=mail@gmail.com, relay=smtp.mailgun.org[34.150.216.144]:587, delay=3.3, delays=0.22/0/2.6/0.42, dsn=4.0.0, status=deferred (host smtp.mailgun.org[34.150.216.144] said: 421 Domain sandbox06091835221a4bdba1b37e3cad48d674.mailgun.org is not allowed to send: Sandbox subdomains are for test purposes only. Please add your own domain or add the address to authorized recipients in Account Settings. (in reply to DATA command))
          Nov 26 08:45:58 webcarehouse postfix/smtpd[51426]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:45:59 webcarehouse postfix/smtpd[51426]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:00 webcarehouse postfix/smtpd[50130]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:46:01 webcarehouse postfix/smtpd[50130]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:02 webcarehouse postfix/smtpd[52998]: warning: hostname net6-ip78.linkbg.com does not resolve to address 87.246.7.78: Name or service not known
          Nov 26 08:46:02 webcarehouse postfix/smtpd[52998]: connect from unknown[87.246.7.78]
          Nov 26 08:46:05 webcarehouse postfix/smtpd[51426]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
          Nov 26 08:46:05 webcarehouse postfix/smtpd[51426]: connect from unknown[87.246.7.227]
          Nov 26 08:46:12 webcarehouse postfix/smtpd[50743]: disconnect from localhost[127.0.0.1] ehlo=1 auth=1 mail=1 rcpt=1 data=1 commands=5
          Nov 26 08:46:19 webcarehouse postfix/smtpd[51426]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:46:20 webcarehouse postfix/smtpd[50130]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
          Nov 26 08:46:20 webcarehouse postfix/smtpd[50130]: connect from unknown[87.246.7.227]
          Nov 26 08:46:20 webcarehouse postfix/smtpd[52998]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:46:20 webcarehouse postfix/smtpd[51426]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:20 webcarehouse postfix/smtpd[52998]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:20 webcarehouse postfix/smtpd[50743]: warning: hostname net6-ip78.linkbg.com does not resolve to address 87.246.7.78: Name or service not known
          Nov 26 08:46:20 webcarehouse postfix/smtpd[50743]: connect from unknown[87.246.7.78]
          Nov 26 08:46:32 webcarehouse postfix/smtpd[50130]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: Connection lost to authentication server
          Nov 26 08:46:33 webcarehouse postfix/smtpd[50130]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:35 webcarehouse postfix/smtpd[51426]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
          Nov 26 08:46:35 webcarehouse postfix/smtpd[51426]: connect from unknown[87.246.7.227]
          Nov 26 08:46:35 webcarehouse postfix/smtpd[50743]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: Connection lost to authentication server
          Nov 26 08:46:37 webcarehouse postfix/smtpd[50743]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:39 webcarehouse postfix/smtpd[52998]: warning: hostname net6-ip78.linkbg.com does not resolve to address 87.246.7.78: Name or service not known
          Nov 26 08:46:39 webcarehouse postfix/smtpd[52998]: connect from unknown[87.246.7.78]
          Nov 26 08:46:41 webcarehouse postfix/smtpd[51426]: warning: unknown[87.246.7.227]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:46:42 webcarehouse postfix/smtpd[51426]: disconnect from unknown[87.246.7.227] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:50 webcarehouse postfix/smtpd[50130]: warning: hostname net6-ip227.linkbg.com does not resolve to address 87.246.7.227: Name or service not known
          Nov 26 08:46:50 webcarehouse postfix/smtpd[50130]: connect from unknown[87.246.7.227]
          Nov 26 08:46:50 webcarehouse postfix/smtpd[52998]: warning: unknown[87.246.7.78]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
          Nov 26 08:46:52 webcarehouse postfix/smtpd[52998]: disconnect from unknown[87.246.7.78] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
          Nov 26 08:46:52 webcarehouse dovecot: auth: Warning: auth client 0 disconnected with 1 pending requests: Connection reset by peer

          An issue was detected.
          This means your test email was unable to be sent.

          Typically this error is returned for one of the following reasons:

          Plugin settings are incorrect (wrong SMTP settings, invalid Mailer configuration, etc).
          Your web server is blocking the connection.
          Your host is rejecting the connection.
          Recommended next steps:
          Triple check the plugin settings, consider reconfiguring to make sure everything is correct (eg bad copy and paste).
          Contact your web hosting provider and ask them to verify your server can make outside connections. Additionally, ask them if a firewall or security policy may be preventing the connection - many shared hosts block certain ports.
          Note: this is the most common cause of this issue.
          Try using a different mailer.

            aaP_iamshoaib216
            Hi, can you give us your aapanel information? The server makes a snapshot backup first, if possible, please send it to kern@aapanel.com.
            It is recommended to fill in the following
            Post link:
            SSH IP address, account password and port:
            aapanel login link address and account password:

            No post link will not be able to know which user's information is

                aaPanel_Kern

                aaPanel not sending emails.I hve been using aapanel for some years nd mny of fetures used to work fine but after the latest upgrade things are not fine especially in email.I installed aapanel and everything configured correctly but emils are not being sent.You must do something aaPanel_Kern to solve this issue
                Yu cn check my configuration is ok

                https://i.imgur.com/1XolgJl.png

                https://i.imgur.com/3W7z6nZ.png

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

                    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?

                        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

                            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?

                              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?


                                  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 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??