Hello,i am a relatively new postfix user I have problems in the configuration and I would like to share opinions >From already thank you very much
I use RHEL8.2 with postfix-3.3.1-12 and openssl-1.1.1c-15 after switching from google to TLS, i can't send with an alias from gmail. I include log May 19 18:41:16 correo postfix/submission/smtpd[164723]: setting up TLS connection from mail-pl1-f180.google.com[209.85.214.180] May 19 18:41:16 correo postfix/submission/smtpd[164723]: mail-pl1-f180.google.com[209.85.214.180]: TLS cipher list "kEECDH:+kEECDH+SHA:kEDH:+kEDH+SHA:+kEDH+CAMELLIA:kECDH:+kECDH+SHA:kRSA:+kRSA+SHA:+kRSA+CAMELLIA:!aNULL:!eNULL:!SSLv2:!MD5:!DES:!EXP:!SEED:!IDEA:!3DES:!EXP:!MEDIUM:!LOW:!DES:!3DES:!SSLv2:!SSLv3" May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:before SSL initialization May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:before SSL initialization May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS read client hello May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write server hello May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write change cipher spec May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:TLSv1.3 write encrypted extensions May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write certificate May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:TLSv1.3 write server certificate verify May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write finished May 19 18:41:16 correo postfix/submission/smtpd[164723]: SSL_accept:TLSv1.3 early data May 19 18:41:17 correo postfix/submission/smtpd[164723]: SSL_accept:TLSv1.3 early data May 19 18:41:17 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS read finished May 19 18:41:17 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write session ticket May 19 18:41:17 correo postfix/submission/smtpd[164723]: SSL_accept:SSLv3/TLS write session ticket May 19 18:41:17 correo postfix/submission/smtpd[164723]: Anonymous TLS connection established from mail-pl1-f180.google.com[209.85.214.180]: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) May 19 18:41:17 correo postfix/submission/smtpd[164723]: lost connection after STARTTLS from mail-pl1-f180.google.com[209.85.214.180] May 19 18:41:17 correo postfix/submission/smtpd[164723]: disconnect from mail-pl1-f180.google.com[209.85.214.180] ehlo=1 starttls=1 commands=2 With other email clients, STARTLS 587 works without problems May 19 18:44:21 correo postfix/submission/smtpd[164867]: initializing the server-side TLS engine May 19 18:44:21 correo postfix/submission/smtpd[164867]: warning: hostname host-cotesma-114-143-100.smandes.com.ar does not resolve to address 181.114.143.100: Name or service not known May 19 18:44:21 correo postfix/submission/smtpd[164867]: connect from unknown[181.114.143.100] May 19 18:44:21 correo postfix/submission/smtpd[164867]: setting up TLS connection from unknown[181.114.143.100] May 19 18:44:21 correo postfix/submission/smtpd[164867]: unknown[181.114.143.100]: TLS cipher list "kEECDH:+kEECDH+SHA:kEDH:+kEDH+SHA:+kEDH+CAMELLIA:kECDH:+kECDH+SHA:kRSA:+kRSA+SHA:+kRSA+CAMELLIA:!aNULL:!eNULL:!SSLv2:!MD5:!DES:!EXP:!SEED:!IDEA:!3DES:!EXP:!MEDIUM:!LOW:!DES:!3DES:!SSLv2:!SSLv3" May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:before SSL initialization May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:before SSL initialization May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS read client hello May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write server hello May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write certificate May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write key exchange May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write server done May 19 18:44:21 correo cyrus/pop3[164825]: USAGE cabelmont user: 0.001622 sys: 0.002688 May 19 18:44:21 correo cyrus/pop3[164825]: counts: retr=<1> top=<0> dele=<0> May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write server done May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS read client key exchange May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS read change cipher spec May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS read finished May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write change cipher spec May 19 18:44:21 correo postfix/submission/smtpd[164867]: SSL_accept:SSLv3/TLS write finished May 19 18:44:21 correo postfix/submission/smtpd[164867]: Anonymous TLS connection established from unknown[181.114.143.100]: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits) May 19 18:44:22 correo postfix/submission/smtpd[164867]: disconnect from unknown[181.114.143.100] ehlo=2 starttls=1 auth=1 quit=1 commands=5 Any ideas? Appreciate kindly help. Regards -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html