Name or service not known

aaP_ken136818346

Aug 31 18:38:11 mail postfix/smtpd[10543]: lost connection after STARTTLS from unknown[192.3..]
Aug 31 18:38:11 mail postfix/smtpd[10543]: disconnect from unknown[192.3...] ehlo=1 starttls=0/1 commands=1/2
Aug 31 18:41:31 mail postfix/anvil[10545]: statistics: max connection rate 1/60s for (smtp:192.3...) at Aug 31 18:38:10
Aug 31 18:41:31 mail postfix/anvil[10545]: statistics: max connection count 1 for (smtp:192.3...) at Aug 31 18:38:10
Aug 31 18:41:31 mail postfix/anvil[10545]: statistics: max cache size 1 at Aug 31 18:38:10
Aug 31 18:44:07 mail postfix/smtpd[10601]: warning: hostname 192-3-..-host.colocrossing.com does not resolve to address 192.3...: Name or service not known
Aug 31 18:44:07 mail postfix/smtpd[10601]: connect from unknown[192.3...]
Aug 31 18:44:08 mail postfix/smtpd[10601]: SSL_accept error from unknown[192.3...]: 0
Aug 31 18:44:08 mail postfix/smtpd[10601]: warning: TLS library problem: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca:s3_pkt.c:1493:SSL alert number 48:

If SMTP cannot be used to send mails, how do I solve the problem?

aaPanel_Kern

aaP_ken136818346
According to the log, it cannot be resolved to colocrossing.com
Please check if nameserver is set? Is the server's network normal?
Check nameserver:
/etc/resolv.conf ping www.aapanel.com
Also check if the mail server's SSL is set

aaP_ken136818346

aaPanel_Kern I can use the same SMTP configuration on another terminal, but not on the other terminal.I don't know why it goes to colocrossing.com? It's not even my domain name.SSL has been configured.root@racknerd-9d7e7d:~# ping www.aapanel.com
PING aapanel.com (128.1.164.230) 56(84) bytes of data.
64 bytes from 128.1.164.230 (128.1.164.230): icmp_seq=1 ttl=53 time=12.0 ms
64 bytes from 128.1.164.230 (128.1.164.230): icmp_seq=2 ttl=53 time=12.1 ms
64 bytes from 128.1.164.230 (128.1.164.230): icmp_seq=3 ttl=53 time=12.0 ms

aaPanel_Kern

aaP_ken136818346
Is this the recipient's domain name? View more logs

aaP_ken136818346

aaPanel_Kern This is not the recipient's information, which is completely different from the email address I tested sending.
Sep 1 10:20:05 mail postfix/smtpd[75706]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:20:05 mail postfix/smtpd[75706]: connect from unknown[192.3.X.X]
Sep 1 10:20:05 mail postfix/smtpd[75705]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:20:05 mail postfix/smtpd[75702]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXX.com: Relay access denied; from=<> to=root@mail.XXX.com proto=ESMTP helo=<mail.XXX.com>
Sep 1 10:20:05 mail postfix/smtpd[75702]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:20:06 mail postfix/smtpd[75706]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXX.com: Relay access denied; from=<> to=root@mail.XXX.com proto=ESMTP helo=<mail.XXX.com>
Sep 1 10:20:06 mail postfix/smtpd[75706]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8

aaPanel_Kern

aaPanel_Kern View more logs

aaP_ken136818346

aaPanel_Kern Sep 1 10:37:05 mail postfix/smtpd[75711]: connect from unknown[192.3.X.X]
Sep 1 10:37:06 mail postfix/smtpd[75711]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:37:06 mail postfix/smtpd[75711]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:03 mail postfix/smtpd[75706]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:03 mail postfix/smtpd[75706]: connect from unknown[192.3.X.X]
Sep 1 10:38:03 mail postfix/smtpd[75705]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:03 mail postfix/smtpd[75705]: connect from unknown[192.3.X.X]
Sep 1 10:38:03 mail postfix/smtpd[75703]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:03 mail postfix/smtpd[75703]: connect from unknown[192.3.X.X]
Sep 1 10:38:03 mail postfix/smtpd[75711]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:03 mail postfix/smtpd[75711]: connect from unknown[192.3.X.X]
Sep 1 10:38:03 mail postfix/smtpd[75702]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:03 mail postfix/smtpd[75702]: connect from unknown[192.3.X.X]
Sep 1 10:38:03 mail postfix/smtpd[75705]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:04 mail postfix/smtpd[75706]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:04 mail postfix/smtpd[75705]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:04 mail postfix/smtpd[75706]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:04 mail postfix/smtpd[75703]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:04 mail postfix/smtpd[75703]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:04 mail postfix/smtpd[75702]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:04 mail postfix/smtpd[75711]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:04 mail postfix/smtpd[75702]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:04 mail postfix/smtpd[75709]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75709]: connect from unknown[192.3.X.X]
Sep 1 10:38:04 mail postfix/smtpd[75705]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75705]: connect from unknown[192.3.X.X]
Sep 1 10:38:04 mail postfix/smtpd[75711]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:04 mail postfix/smtpd[75706]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75706]: connect from unknown[192.3.X.X]
Sep 1 10:38:04 mail postfix/smtpd[75703]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75703]: connect from unknown[192.3.X.X]
Sep 1 10:38:04 mail postfix/smtpd[75702]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75702]: connect from unknown[192.3.X.X]
Sep 1 10:38:04 mail postfix/smtpd[75711]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:04 mail postfix/smtpd[75711]: connect from unknown[192.3.X.X]
Sep 1 10:38:05 mail postfix/smtpd[75709]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=root@mail.XXXXX.com to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:05 mail postfix/smtpd[75705]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:05 mail postfix/smtpd[75706]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:05 mail postfix/smtpd[75706]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:05 mail postfix/smtpd[75709]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:05 mail postfix/smtpd[75705]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:05 mail postfix/smtpd[75703]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:05 mail postfix/smtpd[75703]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:05 mail postfix/smtpd[75702]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:05 mail postfix/smtpd[75711]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:06 mail postfix/smtpd[75702]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:06 mail postfix/smtpd[75706]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:06 mail postfix/smtpd[75706]: connect from unknown[192.3.X.X]
Sep 1 10:38:06 mail postfix/smtpd[75711]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:07 mail postfix/smtpd[75706]: NOQUEUE: reject: RCPT from unknown[192.3.X.X]: 554 5.7.1 root@mail.XXXXX.com: Relay access denied; from=<> to=root@mail.XXXXX.com proto=ESMTP helo=<mail.XXXXX.com>
Sep 1 10:38:07 mail postfix/smtpd[75706]: disconnect from unknown[192.3.X.X] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 rset=1 quit=1 commands=6/8
Sep 1 10:38:44 mail postfix/smtpd[75709]: warning: hostname 192-3-X-X-host.colocrossing.com does not resolve to address 192.3.X.X: Name or service not known
Sep 1 10:38:44 mail postfix/smtpd[75709]: connect from unknown[192.3.X.X]
Sep 1 10:38:45 mail postfix/smtpd[75709]: SSL_accept error from unknown[192.3.X.X]: 0
Sep 1 10:38:45 mail postfix/smtpd[75709]: warning: TLS library problem: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca:s3_pkt.c:1493:SSL alert number 48:
Sep 1 10:38:45 mail postfix/smtpd[75709]: lost connection after STARTTLS from unknown[192.3.X.X]
Sep 1 10:38:45 mail postfix/smtpd[75709]: disconnect from unknown[192.3.X.X] ehlo=1 starttls=0/1 commands=1/2

aaPanel_Kern

aaP_ken136818346
Hi, have you set up a relay? Check it out?

aaP_ken136818346

aaPanel_Kern Hello, no, I only use SMTP to send emails, so I don't need to enable this function.

aaPanel_Kern

aaP_ken136818346
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:

aaP_ken136818346

aaPanel_Kern Hello, it has been sent, please check.