"tls handshake eof" on Stalwart, but no issue on CheckTLS

Sebastian · May 7, 2026, 6:48pm

I’m seeing a strange issue sending mail to the “musicstore.de” domain.
Stalwart just finished its 6th retry (all aborted for both of their mail server).

had their mail connectivity tested by checkups.com and everything looks pretty fine.

(Here would be the second screenshot…)

Here could be the full report.
Looking for a way to attach a PDF.

Here’s the entire error message I got.
Status 4.0.0 is just that “generic temporary failure”.

There was a temporary problem delivering your message to the following recipients:

<[[email protected]](mailto:[email protected])> (TLS error from '[mail2.musicstore.de](http://mail2.musicstore.de/)': I/O error: tls handshake eof)

Reporting-MTA: dns;[mail.example.tld](http://mail.example.tld/)
Arrival-Date: Thu, 30 Apr 2026 09:04:36 +0000

Final-Recipient: rfc822;[[email protected]](mailto:[email protected])
Action: delayed
Status: 4.0.0
Remote-MTA: dns;[mail2.musicstore.de](http://mail2.musicstore.de/)
Will-Retry-Until: Sun, 3 May 2026 09:04:36 +0000

Don’t know where to start.
A hint, anybody?

Kind regards,
Sebastian

helpbot · May 7, 2026, 6:49pm

The error tls handshake eof means the remote server (mail2.musicstore.de) closed the TCP connection abruptly during the TLS handshake negotiation — it never completed the handshake. This is a problem on the receiving server’s side, not Stalwart’s. CheckTLS likely tests from a different IP, uses a slightly different TLS client hello, or tests at a different time, which is why it succeeds.

Here are the most useful next steps:

Use Stalwart’s built-in delivery troubleshooter — In the WebAdmin, go to Manage → Troubleshoot → Email Delivery and enter [email protected]. This tool simulates the full outbound delivery path (MX resolution, DANE/MTA-STS policy, TLS handshake) in real-time and will show you exactly where it fails.
Check if the remote server is filtering your IP — The remote MTA may be terminating the connection based on your IP’s reputation (e.g. blocklist, geo-filter). Try running openssl s_client -starttls smtp -connect mail2.musicstore.de:25 from your server to see if the handshake completes or is dropped.
Check DANE/MTA-STS — If musicstore.de publishes DANE TLSA records or an MTA-STS policy requiring a specific TLS version or cipher suite, and their own server is misconfigured (e.g. expired TLSA record, wrong cert pinned), Stalwart will correctly refuse the connection. The troubleshooter above will flag this.
Contact musicstore.de — Since external tools like CheckTLS pass, the most likely explanation is an intermittent or IP-specific issue on their mail server. Their administrators would need to investigate their logs for connection resets from your IP.

Since this is a 4.x.x (temporary) failure, Stalwart will keep retrying until the retry window expires, so no mail is lost yet.

This is an automated reply from the Stalwart Help Bot. Other community members may follow up if this answer is incomplete or wrong. If you found it useful, mention @helpbot in any reply to ask follow-up questions and the bot will respond again.

Sebastian · May 7, 2026, 6:57pm

The second screenshot missing above.

Just received notice that the same mail message sent through T-Online (Account and Mailserver) went through on first try without any issue. May Stalwart be the problem or some of my settings?

Here’s the report content I could not attach as PDF.

Checking musicstore.de:
from www11-do.CheckTLS.com(V03.95.07/1.1.1g) at 2026-05-06T19:45:48Z
seconds SMTP test(s) and results
[000.001] Trying TLS on mail.musicstore.de[194.8.220.99:25] (10) @2026-05-06T19:45:48.286663Z (S)
[000.124] Server answered
[000.242] <‑‑ 220 mail.musicstore.de
[000.243] We are allowed to connect
[000.243]‑‑> EHLO www11-do.CheckTLS.com
[000.470] <‑‑ 250-MSEXCHANGE.mstore.musicstore.de Hello [167.71.160.115]
250-SIZE 52428800
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250 XRDST
[000.471] We can use this server
[000.471] TLS is an option on this server
[000.471]‑‑> STARTTLS
[000.593] <‑‑ 220 2.0.0 SMTP server ready
[000.594] STARTTLS command works on this server
[000.594] SSL_ocsp_mode = SSL_OCSP_FULL_CHAIN
[000.872] Connection converted to SSL/TLS
SSLVersion in use: TLSv1_2
Cipher in use: ECDHE-RSA-AES128-SHA256
Perfect Forward Secrecy: yes
Session Algorithm in use: P-256(256 bits)
Certificate #1 of 3 (sent by MX):
Cert VALIDATED: ok
Cert Hostname VERIFIED (mail.musicstore.de = *.musicstore.de | DNS:*.musicstore.de | DNS:musicstore.de)
cert not revoked by OCSP
Not Valid Before: Jun 26 00:00:00 2025 GMT
Not Valid After: Jul 27 23:59:59 2026 GMT
Seconds Until Expired: 7100049
subject: /C=DE/ST=Nordrhein-Westfalen/L=Köln/O=MUSIC STORE professional GmbH/CN=*.musicstore.de
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=Thawte TLS RSA CA G1
Certificate #2 of 3 (sent by MX):
Cert VALIDATED: ok
cert not revoked by OCSP
Not Valid Before: Nov 2 12:24:25 2017 GMT
Not Valid After: Nov 2 12:24:25 2027 GMT
Seconds Until Expired: 47061515
subject: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=Thawte TLS RSA CA G1
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
Certificate #3 of 3 (added from CA Root Store):
Cert VALIDATED: ok
cert not revoked by OCSP
Not Valid Before: Aug 1 12:00:00 2013 GMT
Not Valid After: Jan 15 12:00:00 2038 GMT
Seconds Until Expired: 369072850
subject: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
[001.447] ~~> EHLO www11-do.CheckTLS.com
[001.579] <~~ 250-MSEXCHANGE.mstore.musicstore.de Hello [167.71.160.115]
250-SIZE 52428800
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-AUTH NTLM LOGIN
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250 XRDST
[001.579] SSL/TLS is working correctly on this server
[001.579] ~~> MAIL FROM:<[email protected]>
[001.706] <~~ 250 2.1.0 Sender OK
[001.706] Sender is OK
[001.706] ~~> QUIT
[001.826] <~~ 221 2.0.0 Service closing transmission channel
seconds SMTP test(s) and results
[000.001] Trying TLS on mail2.musicstore.de[89.1.14.147:25] (20) @2026-05-06T19:45:50.117939Z (S)
[000.095] Server answered
[000.196] <‑‑ 220 mail.musicstore.de
[000.196] We are allowed to connect
[000.196]‑‑> EHLO www11-do.CheckTLS.com
[000.299] <‑‑ 250-MSEXCHANGE.mstore.musicstore.de Hello [167.71.160.115]
250-SIZE 52428800
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250 XRDST
[000.300] We can use this server
[000.300] TLS is an option on this server
[000.300]‑‑> STARTTLS
[000.394] <‑‑ 220 2.0.0 SMTP server ready
[000.394] STARTTLS command works on this server
[000.394] SSL_ocsp_mode = SSL_OCSP_FULL_CHAIN
[000.627] Connection converted to SSL/TLS
SSLVersion in use: TLSv1_2
Cipher in use: ECDHE-RSA-AES128-SHA256
Perfect Forward Secrecy: yes
Session Algorithm in use: P-256(256 bits)
Certificate #1 of 3 (sent by MX):
Cert VALIDATED: ok
Cert Hostname VERIFIED (mail2.musicstore.de = *.musicstore.de | DNS:*.musicstore.de | DNS:musicstore.de)
cert not revoked by OCSP
Not Valid Before: Jun 26 00:00:00 2025 GMT
Not Valid After: Jul 27 23:59:59 2026 GMT
Seconds Until Expired: 7100047
subject: /C=DE/ST=Nordrhein-Westfalen/L=Köln/O=MUSIC STORE professional GmbH/CN=*.musicstore.de
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=Thawte TLS RSA CA G1
Certificate #2 of 3 (sent by MX):
Cert VALIDATED: ok
cert not revoked by OCSP
Not Valid Before: Nov 2 12:24:25 2017 GMT
Not Valid After: Nov 2 12:24:25 2027 GMT
Seconds Until Expired: 47061513
subject: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=Thawte TLS RSA CA G1
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
Certificate #3 of 3 (added from CA Root Store):
Cert VALIDATED: ok
cert not revoked by OCSP
Not Valid Before: Aug 1 12:00:00 2013 GMT
Not Valid After: Jan 15 12:00:00 2038 GMT
Seconds Until Expired: 369072848
subject: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root G2
[001.083] ~~> EHLO www11-do.CheckTLS.com
[001.177] <~~ 250-MSEXCHANGE.mstore.musicstore.de Hello [167.71.160.115]
250-SIZE 52428800
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-AUTH NTLM LOGIN
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250 XRDST
[001.178] SSL/TLS is working correctly on this server
[001.178] ~~> MAIL FROM:<[email protected]>
[001.272] <~~ 250 2.1.0 Sender OK
[001.272] Sender is OK
[001.272] ~~> QUIT
[001.366] <~~ 221 2.0.0 Service closing transmission channel

Sebastian · May 7, 2026, 7:07pm

While resending the queued mail with Stalwart just failed again, openssling to the server showed nothing unexpected.

openssl s_client -starttls smtp -connect mail2.musicstore.de:25

Connecting to 89.1.14.147
CONNECTED(00000003)
depth=2 C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G2
verify return:1
depth=1 C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Thawte TLS RSA CA G1
verify return:1
depth=0 C=DE, ST=Nordrhein-Westfalen, L=Köln, O=MUSIC STORE professional GmbH, CN=*.musicstore.de
verify return:1
---
Certificate chain
 0 s:C=DE, ST=Nordrhein-Westfalen, L=Köln, O=MUSIC STORE professional GmbH, CN=*.musicstore.de
   i:C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Thawte TLS RSA CA G1
   a:PKEY: RSA, 2048 (bit); sigalg: sha256WithRSAEncryption
   v:NotBefore: Jun 26 00:00:00 2025 GMT; NotAfter: Jul 27 23:59:59 2026 GMT
 1 s:C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Thawte TLS RSA CA G1
   i:C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G2
   a:PKEY: RSA, 2048 (bit); sigalg: sha256WithRSAEncryption
   v:NotBefore: Nov  2 12:24:25 2017 GMT; NotAfter: Nov  2 12:24:25 2027 GMT
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=C=DE, ST=Nordrhein-Westfalen, L=Köln, O=MUSIC STORE professional GmbH, CN=*.musicstore.de
issuer=C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Thawte TLS RSA CA G1
---
No client certificate CA names sent
Client Certificate Types: RSA sign, DSA sign, ECDSA sign
Requested Signature Algorithms: RSA+SHA512:ECDSA+SHA512:RSA+SHA256:RSA+SHA384:ECDSA+SHA256:ECDSA+SHA384
Shared Requested Signature Algorithms: RSA+SHA512:ECDSA+SHA512:RSA+SHA256:RSA+SHA384:ECDSA+SHA256:ECDSA+SHA384
Peer signing digest: SHA256
Peer signature type: rsa_pkcs1_sha256
Peer Temp Key: ECDH, prime256v1, 256 bits
---
SSL handshake has read 3691 bytes and written 1760 bytes
Verification: OK
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES128-SHA256
Protocol: TLSv1.2
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES128-SHA256
    Session-ID: 332D0000BD04B630C5EF43DD141A3A370001D9FF640FEFA4989F39840244B31C
    Session-ID-ctx: 
    Master-Key: 39220D6F50B82C5C4989755A5FB50952703F48F6BCACCED559ABD78D8946EF31D0E82608F2F28E888EB5E38A8516F8B5
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1778180480
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: yes
---
250 XRDST

Sebastian · May 7, 2026, 8:20pm

Here are the TRACE logs.

2026-05-06T18:36:05Z INFO Authentication successful (auth.success) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, accountName = "[email protected]", accountId = 7
2026-05-06T18:36:05Z INFO SMTP MAIL FROM command (smtp.mail-from) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, from = "[email protected]"
2026-05-06T18:36:05Z INFO SMTP RCPT TO command (smtp.rcpt-to) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, to = "[email protected]"
2026-05-06T18:36:05Z INFO DKIM verification failed (smtp.dkim-fail) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, strict = false, result = [], elapsed = 0ms
2026-05-06T18:36:05Z INFO Milter action: Accept (milter.action-accept) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, id = "MtaMilter with id iokqok7wacaa", elapsed = 152ms
2026-05-06T18:36:05Z INFO Queued message submission for delivery (queue.authenticated-message-queued) listenerId = "submission", localPort = 587, remoteIp = 91.2.223.249, remotePort = 62371, queueId = 305791113971630592, from = "[email protected]", to = ["[email protected]"], size = 20148, nextRetry = 2026-05-06T18:36:05Z, nextDsn = 2026-05-07T18:36:05Z, expires = 2026-05-09T18:36:05Z
2026-05-06T18:36:05Z INFO Delivery attempt started (delivery.attempt-start) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1
2026-05-06T18:36:05Z INFO New delivery attempt for domain (delivery.domain-delivery-start) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de"
2026-05-06T18:36:05Z INFO TLS-RPT record not found (tls-rpt.record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", elapsed = 29ms
2026-05-06T18:36:06Z INFO MTA-STS policy not found (mta-sts.policy-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", strict = false, elapsed = 49ms
2026-05-06T18:36:06Z INFO TLSA record not found (dane.tlsa-record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", strict = false, elapsed = 42ms
2026-05-06T18:36:06Z INFO Connecting to remote server (delivery.connect) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", localIp = 152.53.173.43, remoteIp = 194.8.220.99, remotePort = 25, elapsed = 39ms
2026-05-06T18:36:06Z INFO STARTTLS error (delivery.start-tls-error) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", reason = SMTP error occurred (smtp.error) { details = "I/O Error", reason = "tls handshake eof" }, elapsed = 83ms
2026-05-06T18:36:06Z INFO TLSA record not found (dane.tlsa-record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", strict = false, elapsed = 24ms
2026-05-06T18:36:06Z INFO Connecting to remote server (delivery.connect) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", localIp = 152.53.173.43, remoteIp = 89.1.14.147, remotePort = 25, elapsed = 14ms
2026-05-06T18:36:06Z INFO STARTTLS error (delivery.start-tls-error) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", reason = SMTP error occurred (smtp.error) { details = "I/O Error", reason = "tls handshake eof" }, elapsed = 30ms
2026-05-06T18:36:06Z INFO Message rescheduled for delivery (queue.rescheduled) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, nextRetry = 2026-05-06T18:38:06Z, nextDsn = 2026-05-07T18:36:05Z, expires = 2026-05-09T18:36:05Z
2026-05-06T18:36:06Z INFO Delivery attempt ended (delivery.attempt-end) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, elapsed = 513ms
2026-05-06T18:37:15Z INFO TLS handshake (tls.handshake) listenerId = "imap", localPort = 143, remoteIp = 91.2.223.249, remotePort = 62387, listenerId = "imap", version = "TLSv1_2", details = "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384"
2026-05-06T18:37:15Z INFO Authentication successful (auth.success) listenerId = "imap", localPort = 143, remoteIp = 91.2.223.249, remotePort = 62387, accountName = "[email protected]", accountId = 7
2026-05-06T18:37:16Z INFO TLS handshake (tls.handshake) listenerId = "imap", localPort = 143, remoteIp = 91.2.223.249, remotePort = 62392, listenerId = "imap", version = "TLSv1_2", details = "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384"
2026-05-06T18:37:16Z INFO Authentication successful (auth.success) listenerId = "imap", localPort = 143, remoteIp = 91.2.223.249, remotePort = 62392, accountName = "[email protected]", accountId = 7
2026-05-06T18:38:06Z INFO Delivery attempt started (delivery.attempt-start) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1
2026-05-06T18:38:06Z INFO New delivery attempt for domain (delivery.domain-delivery-start) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de"
2026-05-06T18:38:06Z INFO TLS-RPT record not found (tls-rpt.record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", elapsed = 0ms
2026-05-06T18:38:06Z INFO MTA-STS policy not found (mta-sts.policy-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", strict = false, elapsed = 1ms
2026-05-06T18:38:06Z INFO TLSA record not found (dane.tlsa-record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", strict = false, elapsed = 6ms
2026-05-06T18:38:06Z INFO Connecting to remote server (delivery.connect) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", localIp = 152.53.173.43, remoteIp = 194.8.220.99, remotePort = 25, elapsed = 38ms
2026-05-06T18:38:06Z INFO STARTTLS error (delivery.start-tls-error) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail.musicstore.de", reason = SMTP error occurred (smtp.error) { details = "I/O Error", reason = "tls handshake eof" }, elapsed = 82ms
2026-05-06T18:38:06Z INFO TLSA record not found (dane.tlsa-record-not-found) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", strict = false, elapsed = 4ms
2026-05-06T18:38:06Z INFO Connecting to remote server (delivery.connect) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", localIp = 152.53.173.43, remoteIp = 89.1.14.147, remotePort = 25, elapsed = 14ms
2026-05-06T18:38:06Z INFO STARTTLS error (delivery.start-tls-error) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, domain = "musicstore.de", hostname = "mail2.musicstore.de", reason = SMTP error occurred (smtp.error) { details = "I/O Error", reason = "tls handshake eof" }, elapsed = 29ms
2026-05-06T18:38:06Z INFO Message rescheduled for delivery (queue.rescheduled) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, nextRetry = 2026-05-06T18:43:06Z, nextDsn = 2026-05-07T18:36:05Z, expires = 2026-05-09T18:36:05Z
2026-05-06T18:38:06Z INFO Delivery attempt ended (delivery.attempt-end) queueId = 305791113971630592, queueName = "remote", from = "[email protected]", to = ["[email protected]"], size = 20148, total = 1, elapsed = 293ms