Can't send mail, help

1.9.0 updated, and can’t send mail. Output;

Sep 3 02:38:02 localhost postfix/qmgr[3007]: 4AC53231C2D7: from=[email protected], size=1230, nrcpt=1 (queue active)
Sep 3 02:38:02 localhost postfix/pipe[3106]: 4AC53231C2D7: to=[email protected], orig_to=, relay=dovecot, delay=0.79, delays=0.74/0/0/0.06, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:38:02 localhost postfix/qmgr[3007]: 4AC53231C2D7: removed
Sep 3 02:38:51 localhost postfix/smtpd[3847]: connect from static.185.126.40.188.clients.your-server.de[188.40.126.185]
Sep 3 02:38:51 localhost postfix/smtpd[3847]: warning: static.185.126.40.188.clients.your-server.de[188.40.126.185]: SASL LOGIN authentication failed: Invalid authentication mechanism
Sep 3 02:38:51 localhost postfix/smtpd[3847]: disconnect from static.185.126.40.188.clients.your-server.de[188.40.126.185]
Sep 3 02:39:01 localhost postfix/pickup[3006]: D45AC2378FCA: uid=5031 from=
Sep 3 02:39:01 localhost postfix/cleanup[3019]: D45AC2378FCA: message-id=[email protected]
Sep 3 02:39:01 localhost opendkim[1590]: D45AC2378FCA: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:39:01 localhost postfix/qmgr[3007]: D45AC2378FCA: from=[email protected], size=1331, nrcpt=1 (queue active)
Sep 3 02:39:02 localhost postfix/pipe[3106]: D45AC2378FCA: to=[email protected], orig_to=, relay=dovecot, delay=0.52, delays=0.45/0/0/0.07, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:39:02 localhost postfix/qmgr[3007]: D45AC2378FCA: removed
Sep 3 02:39:02 localhost postfix/pickup[3006]: 5BF5B231C2D7: uid=5031 from=
Sep 3 02:39:02 localhost postfix/cleanup[3019]: 5BF5B231C2D7: message-id=[email protected]
Sep 3 02:39:02 localhost opendkim[1590]: 5BF5B231C2D7: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:39:02 localhost postfix/qmgr[3007]: 5BF5B231C2D7: from=[email protected], size=1308, nrcpt=1 (queue active)
Sep 3 02:39:02 localhost postfix/pipe[3106]: 5BF5B231C2D7: to=[email protected], orig_to=, relay=dovecot, delay=1, delays=0.96/0/0/0.04, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:39:02 localhost postfix/qmgr[3007]: 5BF5B231C2D7: removed
Sep 3 02:40:01 localhost postfix/pickup[3006]: E6EAF231C2D7: uid=5031 from=
Sep 3 02:40:01 localhost postfix/cleanup[3019]: E6EAF231C2D7: message-id=[email protected]
Sep 3 02:40:01 localhost opendkim[1590]: E6EAF231C2D7: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:40:02 localhost postfix/qmgr[3007]: E6EAF231C2D7: from=[email protected], size=1228, nrcpt=1 (queue active)
Sep 3 02:40:02 localhost postfix/pipe[3106]: E6EAF231C2D7: to=[email protected], orig_to=, relay=dovecot, delay=0.46, delays=0.41/0/0/0.04, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:40:02 localhost postfix/qmgr[3007]: E6EAF231C2D7: removed
Sep 3 02:40:02 localhost postfix/pickup[3006]: 4E876231C2D7: uid=5031 from=
Sep 3 02:40:02 localhost postfix/cleanup[3019]: 4E876231C2D7: message-id=[email protected]
Sep 3 02:40:02 localhost opendkim[1590]: 4E876231C2D7: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:40:02 localhost postfix/qmgr[3007]: 4E876231C2D7: from=[email protected], size=1251, nrcpt=1 (queue active)
Sep 3 02:40:02 localhost postfix/pipe[3106]: 4E876231C2D7: to=[email protected], orig_to=, relay=dovecot, delay=0.84, delays=0.79/0/0/0.05, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:40:02 localhost postfix/qmgr[3007]: 4E876231C2D7: removed
Sep 3 02:41:01 localhost postfix/pickup[3006]: CA5D4238723B: uid=5031 from=
Sep 3 02:41:01 localhost postfix/cleanup[3019]: CA5D4238723B: message-id=[email protected]
Sep 3 02:41:01 localhost opendkim[1590]: CA5D4238723B: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:41:01 localhost postfix/qmgr[3007]: CA5D4238723B: from=[email protected], size=1332, nrcpt=1 (queue active)
Sep 3 02:41:01 localhost postfix/pipe[3106]: CA5D4238723B: to=[email protected], orig_to=, relay=dovecot, delay=0.46, delays=0.4/0/0/0.05, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:41:01 localhost postfix/qmgr[3007]: CA5D4238723B: removed
Sep 3 02:41:02 localhost postfix/pickup[3006]: 31112231C2D7: uid=5031 from=
Sep 3 02:41:02 localhost postfix/cleanup[3019]: 31112231C2D7: message-id=[email protected]
Sep 3 02:41:02 localhost opendkim[1590]: 31112231C2D7: DKIM-Signature field added (s=default, d=devlopsoft.com)
Sep 3 02:41:02 localhost postfix/smtpd[4095]: connect from unknown[185.234.218.156]
Sep 3 02:41:02 localhost postfix/qmgr[3007]: 31112231C2D7: from=[email protected], size=1309, nrcpt=1 (queue active)
Sep 3 02:41:02 localhost postfix/pipe[3106]: 31112231C2D7: to=[email protected], orig_to=, relay=dovecot, delay=0.8, delays=0.76/0/0/0.04, dsn=2.0.0, status=sent (delivered via dovecot service)
Sep 3 02:41:02 localhost postfix/qmgr[3007]: 31112231C2D7: removed
Sep 3 02:41:02 localhost postfix/smtpd[4095]: warning: unknown[185.234.218.156]: SASL LOGIN authentication failed: Invalid authentication mechanism
Sep 3 02:41:02 localhost postfix/smtpd[4095]: lost connection after AUTH from unknown[185.234.218.156]
Sep 3 02:41:02 localhost postfix/smtpd[4095]: disconnect from unknown[185.234.218.156]
Sep 3 02:41:22 localhost postfix/smtpd[4095]: connect from unknown[193.169.252.176]
Sep 3 02:41:22 localhost postfix/smtpd[4095]: warning: unknown[193.169.252.176]: SASL LOGIN authentication failed: Invalid authentication mechanism
Sep 3 02:41:22 localhost postfix/smtpd[4095]: lost connection after AUTH from unknown[193.169.252.176]
Sep 3 02:41:22 localhost postfix/smtpd[4095]: disconnect from unknown[193.169.252.176]