Error sending message in roundcube

Hello, I looked on the internet for a solution to my problem, but I did not found ... I have a problem with Roundcube when I try sending the email I see it "Sending message" and all screen is frozen.
I installed the server on ubuntu 20.04 with this link https://www.howtoforge.com/tutorial...l-pureftpd-bind-postfix-doveot-and-ispconfig/

I don't know where to start looking for a solution to this problem.

 

Soory for question but this path is good to chceck logs ? /var/log/mail.log ?

 

When I try to sent message in log I see it

Code:

May 13 14:14:06 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47696, secured, session=<GMx6vTbC4L5/AAAB>
May 13 14:14:06 panel dovecot: imap([email protected])<47696><GMx6vTbC4L5/AAAB>: Logged out in=29 out=537 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
May 13 14:14:06 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47698, secured, session=<0QF8vTbC4r5/AAAB>
May 13 14:14:06 panel dovecot: imap([email protected])<47698><0QF8vTbC4r5/AAAB>: Logged out in=70 out=676 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
May 13 14:14:06 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47701, secured, session=<CKh+vTbC5L5/AAAB>
May 13 14:14:06 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47702, secured, session=<4ul+vTbC5r5/AAAB>
May 13 14:14:06 panel dovecot: imap([email protected])<47701><CKh+vTbC5L5/AAAB>: Logged out in=233 out=1101 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
May 13 14:14:06 panel dovecot: imap([email protected])<47702><4ul+vTbC5r5/AAAB>: Logged out in=368 out=1724 deleted=0 expunged=0 trashed=0 hdr_count=1 hdr_bytes=246 body_count=0 body_bytes=0
May 13 14:14:09 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47704, secured, session=<Q8avvTbC6L5/AAAB>
May 13 14:14:10 panel dovecot: imap([email protected])<47704><Q8avvTbC6L5/AAAB>: Logged out in=458 out=2021 deleted=0 expunged=0 trashed=0 hdr_count=1 hdr_bytes=373 body_count=1 body_bytes=52
May 13 14:14:10 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47706, secured, session=<Es28vTbC6r5/AAAB>
May 13 14:14:10 panel dovecot: imap([email protected])<47706><Es28vTbC6r5/AAAB>: Logged out in=417 out=1947 deleted=0 expunged=0 trashed=0 hdr_count=1 hdr_bytes=373 body_count=1 body_bytes=52
May 13 14:14:10 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47708, secured, session=<suS+vTbC7L5/AAAB>
May 13 14:14:10 panel dovecot: imap([email protected])<47708><suS+vTbC7L5/AAAB>: Logged out in=54 out=849 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
May 13 14:14:12 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47710, secured, session=<Dt/PvTbC7r5/AAAB>
May 13 14:14:12 panel dovecot: imap([email protected])<47710><Dt/PvTbC7r5/AAAB>: Logged out in=32 out=520 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
May 13 14:14:12 panel dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=47712, secured, session=<667QvTbC8L5/AAAB>
May 13 14:14:12 panel dovecot: imap([email protected])<47712><667QvTbC8L5/AAAB>: Logged out in=417 out=1947 deleted=0 expunged=0 trashed=0 hdr_count=1 hdr_bytes=373 body_count=1 body_bytes=52
May 13 14:14:14 panel postfix/smtps/smtpd[47713]: connect from localhost[127.0.0.1]
May 13 14:15:02 panel dovecot: pop3-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<uGzYwDbCEJJ/AAAB>
May 13 14:15:02 panel dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<xZLYwDbC/L5/AAAB>
May 13 14:15:03 panel postfix/submission/smtpd[47825]: connect from localhost[127.0.0.1]
May 13 14:15:03 panel postfix/submission/smtpd[47825]: lost connection after CONNECT from localhost[127.0.0.1]
May 13 14:15:03 panel postfix/submission/smtpd[47825]: disconnect from localhost[127.0.0.1] commands=0/0
May 13 14:15:38 panel postfix/smtps/smtpd[47488]: SSL_accept error from localhost[127.0.0.1]: Connection timed out
May 13 14:15:38 panel postfix/smtps/smtpd[47488]: lost connection after CONNECT from localhost[127.0.0.1]
May 13 14:15:38 panel postfix/smtps/smtpd[47488]: disconnect from localhost[127.0.0.1] commands=0/0
May 13 14:17:02 panel postfix/smtpd[47573]: timeout after END-OF-MESSAGE from localhost[127.0.0.1]
May 13 14:17:02 panel postfix/smtpd[47573]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 commands=4