so i have this problem where i can send mail perfectly fine but cant recive any (port 25 unlocked) I'm using Ubuntu 18.04.5. @aaPanel_Jose please help me Logs" Nov 10 23:06:03 vmi451560 postfix/smtpd[21724]: connect from mail-yb1-f175.google.com[209.85.219.175] Nov 10 23:06:03 vmi451560 postfix/smtpd[21677]: warning: unknown[45.142.120.147]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Nov 10 23:06:03 vmi451560 postfix/smtpd[21724]: lost connection after STARTTLS from mail-yb1-f175.google.com[209.85.219.175] Nov 10 23:06:03 vmi451560 postfix/cleanup[23197]: 68A903A22EC: message-id=<20201110220603.68A903A22EC@vmi451560.contaboserver.net> Nov 10 23:06:03 vmi451560 postfix/smtpd[21724]: disconnect from mail-yb1-f175.google.com[209.85.219.175] ehlo=1 starttls=0/1 commands=1/2 Nov 10 23:06:03 vmi451560 postfix/qmgr[16845]: 68A903A22EC: from=<double-bounce@vmi451560.contaboserver.net>, size=1022, nrcpt=1 (queue active) Nov 10 23:06:03 vmi451560 postfix/smtp[23199]: 68A903A22EC: to=<postmaster@vmi451560.contaboserver.net>, orig_to=<postmaster>, relay=none, delay=0.05, delays=0.03/0.02/0/0, dsn=5.4.6, status=bounced (mail for vmi451560.contaboserver.net loops back to myself) Nov 10 23:06:03 vmi451560 postfix/bounce[23200]: warning: 68A903A22EC: undeliverable postmaster notification discarded Nov 10 23:06:03 vmi451560 postfix/qmgr[16845]: 68A903A22EC: removed

skorupion Please try to enable the email domain SSL on the mail server

Thanks very much a little tutorial if someone doesn't know how to do this: Go into your domain and set up SSL via Let's encrypt (if you don't have a certificate). Copy your private key. Then go into your mail server and go into Domain List, click add SSL ( i would recommend having 2 tabs open: 1 with your certificate and one with your mail server). Paste your private key, then from the other tab copy the public key, and paste it in too. Then click save and you should be able to receive emails.

mail server would work with cloud flare ssl or not?

aaPanel_Jose ! I hv the same issue here,and i tried your suggestion above but still emails are not sent

aaP_pcdrips 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 If the display is not OK, please re-apply for SSL Unable to send dkim headers Troubleshoot log /var/log/rspamd/rspamd.log Prompt for permission issues: 2022-04-20 00:27:56 #1363(rspamd_proxy) <6795e9>; proxy; dkim_module_load_key_format: cannot load dkim key /www/server/dkim/xx.com/default.private: cannot map key file: '/www /server/dkim/xx.com/default.private' Permission denied Set 640 to 644, then restart rspamd to send emails to view the email source code, please replace xxx.com with your domain name. chmod 644 /www/server/dkim/xx.com/default.private systemctl restart rspamd Use this website to check whether the records of DKIM and SPF are correct? https://www.dmarcanalyzer.com/dkim/dkim-checker/ https://dnschecker.org/spf-record-validation.php Check the mail score and troubleshoot according to its error message https://www.mail-tester.com/ Check blacklists https://mxtoolbox.com/

aaPanel_Kern I dont see tht file smtpd_tls_chain_files=/etc/ssl/private/ssl-cert-snakeoil.key,/etc/ssl/certs/ssl-cert-snakeoil.pem

aaP_pcdrips Postfix config in the Service Status of the mail server

aaPanel_Kern My hostnme is my.mdandu.com what if i change default nvmeserver above to my.mdandu.com? as you hav seen in above where i need to verify contaboserver which is impossible because i dont own that domain but its a defult subdomain after i bought server.

aaPanel_Kern Whats wrong from this latest log

Just set up a domain name that you own. The latest did not see any problems

Mail server cant recive emails

aaP_pcdrips

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