David_Chriss
Try to apply for SSL. Check the configuration of postfix at the same time

openssl s_client -connect mx.pressplay.top:587 -starttls smtp

David_Chriss

This is my normal configuration. You can refer to

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
# fresh installs.
compatibility_level = 2



# TLS parameters
#smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
#smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level = may

smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache


smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = kern123.top
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = 
relayhost = 
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
virtual_mailbox_domains = sqlite:/etc/postfix/sqlite_virtual_domains_maps.cf
virtual_alias_maps = sqlite:/etc/postfix/sqlite_virtual_alias_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_catchall_maps.cf
virtual_mailbox_maps = sqlite:/etc/postfix/sqlite_virtual_mailbox_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_mailbox_maps.cf
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_use_tls = yes
virtual_transport = lmtp:unix:private/dovecot-lmtp
smtpd_milters = inet:127.0.0.1:11332
non_smtpd_milters = inet:127.0.0.1:11332
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
milter_protocol = 6
milter_default_action = accept
message_size_limit = 102400000

#smtpd_tls_chain_files = /etc/ssl/private/ssl-cert-snakeoil.key,/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_chain_files = /www/server/panel/plugin/mail_sys/cert/xxxx.top/privkey.pem,/www/server/panel/plugin/mail_sys/cert/xxxx.top/fullchain.pem
tls_server_sni_maps = hash:/etc/postfix/vmail_ssl.map

David_Chriss
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

Hello, I also have the same problem with my WordPress.
But I don't know how to solve it?

Can you give me some guidelines to follow?

Or do I have to give my login information as well?

aaP_krissiankg
Hello, please try to reapply for SSLs at the mail server. At the same time, check the postfix configuration, which can be viewed in the server status
"mail.135mailtest.com" is replaced with your domain name
Put:
smtpd_tls_chain_files=/etc/ssl/private/ssl-cert-snakeoil.key,/etc/ssl/certs/ssl-cert-snakeoil.pem
Change to:
smtpd_tls_chain_files = /www/server/panel/plugin/mail_sys/cert/135mailtest.com/privkey.pem,/www/server/panel/plugin/mail_sys/cert/135mailtest.com/fullchain.pem
Note to replace 135mailtest.com with your domain name.
Also check /www/server/panel/plugin/mail_sys/cert/135mailtest.com/ for privkey.pem and fullchain.pem files

You can use this command to check whether the correct SSL is configured
openssl s_client -connect mail.135mailtest.com:587 -starttls smtp
or
openssl s_client -connect mail.135mailtest.com:465 -starttls smtp

aaPanel_Kern

Hello Mr
unfortunately my problem still continues.

here is the information from the postfix_config_file :

See /usr/share/postfix/main.cf.dist for a commented, more complete version

Debian specific: Specifying a file name will cause the first

line of that file to be used as the name. The Debian default

is /etc/mailname.

#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

appending .domain is the MUA's job.

append_dot_mydomain = no

Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

readme_directory = no

See http://www.postfix.org/COMPATIBILITY_README.html -- default to 3.6 on

fresh installs.

compatibility_level = 3.6

TLS parameters

#smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
#smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level = may

smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = ip-172-31-0-172.ec2.internal
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination =
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
virtual_mailbox_domains = sqlite:/etc/postfix/sqlite_virtual_domains_maps.cf
virtual_alias_maps = sqlite:/etc/postfix/sqlite_virtual_alias_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_catchall_maps.cf
virtual_mailbox_maps = sqlite:/etc/postfix/sqlite_virtual_mailbox_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_mailbox_maps.cf
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_use_tls = yes
virtual_transport = lmtp:unix:private/dovecot-lmtp
smtpd_milters = inet:127.0.0.1:11332
non_smtpd_milters = inet:127.0.0.1:11332
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
milter_protocol = 6
milter_default_action = accept
message_size_limit = 102400000

smtpd_tls_chain_files = /www/server/panel/plugin/mail_sys/cert/guelichwebboost.xyz/privkey.pem,/www/server/panel/plugin/mail_sys/cert/guelichwebboost.xyz/fullchain.pem

tls_server_sni_maps = hash:/etc/postfix/vmail_ssl.map

I have launched the verification
openssl s_client -connect mail.135mailtest.com:465 -starttls smtp

here is the result

pourtant sur mon wordpress, j'ai toujours le mm problème :

--------------------------------- FULL ERROR LOG
Versions:
WordPress: 6.1.1
WordPress MS: No
PHP: 7.4.33
WP Mail SMTP: 3.6.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server
Host: mail.guelichwebboost.xyz
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.0.2u 20 Dec 2019

Debug:
Email Source: WP Mail SMTP Pro
Mailer: Autre SMTP
SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server

SMTP Debug:
2022-11-23 10:19:21 Connection: opening to ssl://mail.guelichwebboost.xyz:465, timeout=300, options=array()

2022-11-23 10:19:21 Connection failed. Error #2: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol [/www/wwwroot/form.guelichwebboost.xyz/wp-includes/PHPMailer/SMTP.php line 389]

2022-11-23 10:19:21 Connection failed. Error #2: stream_socket_client(): Failed to enable crypto [/www/wwwroot/form.guelichwebboost.xyz/wp-includes/PHPMailer/SMTP.php line 389]

2022-11-23 10:19:21 Connection failed. Error #2: stream_socket_client(): unable to connect to ssl://mail.guelichwebboost.xyz:465 (Unknown error) [/www/wwwroot/form.guelichwebboost.xyz/wp-includes/PHPMailer/SMTP.php line 389]

2022-11-23 10:19:21 SMTP ERROR: Failed to connect to server: (0)

SMTP Error: Could not connect to SMTP host. Failed to connect to server

aaP_krissiankg
Hello, a message is displayed indicating that the server cannot be connected. Run the command to check the connection
apt install telnet -y && telnet mail.guelichwebboost.xyz 465

aaPanel_Kern

root@ip-172-31-0-172:~# apt install telnet -y && telnet mail.guelichwebboost.xyz 465
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
telnet is already the newest version (0.17-44build1).
telnet set to manually installed.
The following packages were automatically installed and are no longer required:
libflashrom1 libftdi1-2 liblockfile-bin liblockfile1 lockfile-progs
sendmail-base sensible-mda
Use 'apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
Trying 3.81.197.65...
Connected to mail.guelichwebboost.xyz.
Escape character is '^]'.
220 ip-172-31-0-172.ec2.internal ESMTP Postfix (Ubuntu)

aaP_krissiankg
Hello, I suggest you try again and check whether the input information of wp is correct.

aaPanel_Kern

please check with me
Here is the information for the server and the users
I will take one of the users and fill my wp

here is the filling of the wp

aaP_krissiankg
Hello, could you please send your aapanel information to us? The server does snapshot backup first. If yes, send it to kern@aapanel.com.
You are advised to enter the value as follows
Link to post:
SSH IP address, account password, and port number:
aapanel login link and account password:
There is no way to know which user's message is without a link to the post
wordpress Background login Information and email user information:

aaPanel_Kern

Hello Mr
sorry for the silence
I just sent you an email from (krissiankg@gmail.com)

aaPanel_Kern

root@ip-172-31-0-172:~# telnet hello-mail.aapanel.com 25
Trying 128.1.164.230...
telnet: Unable to connect to remote host: Connection timed out
root@ip-172-31-0-172:~#

aaP_krissiankg
Hello, try Google, if still can not suggest consulting the network provider or server provider
telnet gmail-smtp-in.l.google.com 25