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<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hi</div>
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I am using lastest stunnel version. </div>
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When i try to send an email, i get:</div>
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<div class="PlainText"><b>"error permanente de SMTP: 503 Bad sequence of commands".</b><br>
<br>
This is the trace generated when I try to send an email.<br>
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<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG5[main]: Reading configuration from file stunnel.conf</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG5[main]: UTF-8 byte order mark not detected</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG5[main]: FIPS mode disabled</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG5[main]: Configuration successful</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG7[main]: Binding service [pseudo-ssmtp]</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG7[main]: Listening file descriptor created (FD=568)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG7[main]: Option SO_EXCLUSIVEADDRUSE set on accept socket</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG7[main]: Service [pseudo-ssmtp] (FD=568) bound to 172.31.41.84:116</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:08 LOG7[main]: Signal pipe is empty</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Found 1 ready file descriptor(s)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: FD=324 ifds=r-x ofds=r--</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Dispatching signals from the signal pipe</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Processing SIGNAL_RELOAD_CONFIG</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Running on Windows 6.1</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG5[main]: Reading configuration from file stunnel.conf</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG5[main]: UTF-8 byte order mark not detected</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG5[main]: FIPS mode disabled</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Compression disabled</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Snagged 64 random bytes from C:/.rnd</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Wrote 1024 new random bytes to C:/.rnd</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: PRNG seeded successfully</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG6[main]: Initializing service [pseudo-ssmtp]</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Ciphers: HIGH:!DH:!aNULL:!SSLv2</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: TLS options: 0x03000004 (+0x03000000, 0x00000000)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG6[main]: Loading certificate from file: stunnel.pem</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG6[main]: Certificate loaded from file: stunnel.pem</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG6[main]: Loading private key from file: stunnel.pem</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG6[main]: Private key loaded from file: stunnel.pem</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Private key check succeeded</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG5[main]: Configuration successful</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Unbinding service [pseudo-ssmtp]</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Service [pseudo-ssmtp] closed (FD=568)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Service [pseudo-ssmtp] closed</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Binding service [pseudo-ssmtp]</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Listening file descriptor created (FD=568)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Option SO_EXCLUSIVEADDRUSE set on accept socket</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Service [pseudo-ssmtp] (FD=568) bound to 172.31.41.84:116</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:22 LOG7[main]: Signal pipe is empty</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[main]: Found 1 ready file descriptor(s)</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[main]: FD=324 ifds=r-x ofds=---</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[main]: Service [pseudo-ssmtp] accepted (FD=584) from 172.31.41.84:53557</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[main]: Creating a new thread</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[main]: New thread created</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[37]: Service [pseudo-ssmtp] started</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[37]: Option TCP_NODELAY set on local socket</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG5[37]: Service [pseudo-ssmtp] accepted connection from 172.31.41.84:53557</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG6[37]: failover: round-robin, starting at entry #1</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG6[37]: s_connect: connecting 212.227.15.158:465</span><br>
<span style="font-size: 8pt;"> 2018.05.14 12:59:34 LOG7[37]: s_connect: s_poll_wait 212.227.15.158:465: waiting 10 seconds</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: s_connect: connected 212.227.15.158:465</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: Service [pseudo-ssmtp] connected remote server from 172.31.41.84:53558</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: Option TCP_NODELAY set on remote socket</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: Remote descriptor (FD=552) initialized</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: SNI: sending servername: smtp.1and1.es</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: Peer certificate required</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: TLS state (connect): before/connect initialization</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: TLS state (connect): SSLv2/v3 write client hello A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: TLS state (connect): SSLv3 read server hello A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: Verification started at depth=2: C=US, O="thawte, Inc.", OU=Certification Services Division, OU="(c) 2006 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: CERT: Pre-verification succeeded</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: OCSP: Ignoring root certificate</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: Certificate accepted at depth=2: C=US, O="thawte, Inc.", OU=Certification Services Division, OU="(c) 2006 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: Verification started at depth=1: C=US, O="thawte, Inc.", CN=thawte SSL CA - G2</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: CERT: Pre-verification succeeded</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: OCSP: Connecting the AIA responder "</span><a href="http://t2.symcb.com"><span style="font-size: 8pt;">http://t2.symcb.com</span></a><span style="font-size: 8pt;">"</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: s_connect: connecting 23.5.251.27:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: s_connect: s_poll_wait 23.5.251.27:80: waiting 10 seconds</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: s_connect: connected 23.5.251.27:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: OCSP: Connected t2.symcb.com:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: OCSP: Response received</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: OCSP: Status: good</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: OCSP: This update: May 13 18:15:02 2018 GMT</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: OCSP: Next update: May 20 18:15:02 2018 GMT</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: OCSP: Certificate accepted</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: Certificate accepted at depth=1: C=US,
</span><span style="font-size: 8pt;">O="thawte, Inc.", CN=thawte SSL CA - G2</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: Verification started at depth=0: C=DE, ST=Rheinland-Pfalz, L=Montabaur, O=1&1 Internet SE, CN=smtp.1and1.es</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: CERT: Pre-verification succeeded</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: CERT: Host name "smtp.1and1.es" matched with "smtp.1and1.es"</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG5[37]: OCSP: Connecting the AIA responder "</span><a href="http://tj.symcd.com"><span style="font-size: 8pt;">http://tj.symcd.com</span></a><span style="font-size: 8pt;">"</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG6[37]: s_connect: connecting 23.5.251.27:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:34 LOG7[37]: s_connect: s_poll_wait 23.5.251.27:80: waiting 10 seconds</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG5[37]: s_connect: connected 23.5.251.27:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: OCSP: Connected tj.symcd.com:80</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: OCSP: Response received</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: OCSP: Status: good</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: OCSP: This update: May 14 01:38:59 2018 GMT</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: OCSP: Next update: May 21 01:38:59 2018 GMT</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG5[37]: OCSP: Certificate accepted</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG5[37]: Certificate accepted at depth=0: C=DE, ST=Rheinland-Pfalz, L=Montabaur, O=1&1 Internet SE, CN=smtp.1and1.es</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 read server certificate A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 read server key exchange A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: Client certificate not requested</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 read server done A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 write client key exchange A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 write change cipher spec A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 write finished A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 flush data</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: TLS state (connect): SSLv3 read finished A</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: 1 client connect(s) requested</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: 1 client connect(s) succeeded</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: 0 client renegotiation(s) requested</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: 0 session reuse(s)</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: TLS connected: new session negotiated</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: Peer certificate was cached (5543 bytes)</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG6[37]: Negotiated TLSv1.2 ciphersuite ECDHE-RSA-AES256-GCM-SHA384 (256-bit encryption)</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:35 LOG7[37]: Compression: null, expansion: null</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:53 LOG3[36]: transfer: s_poll_wait: TIMEOUTclose exceeded: closing</span><br>
<span style="font-size: 8pt;">2018.05.14 12:59:53 LOG5[36]: Connection closed: 15 byte(s) sent to TLS, 166 byte(s) sent to socket</span><br>
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<div class="PlainText">I can't find the error.</div>
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<div class="PlainText">Thanks in advance for your help.</div>
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<div class="PlainText">Best regards,</div>
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<div class="PlainText">Alix</div>
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