Connection could not be established with host "ssl://localhost:587": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

[maximus-sallam]

Preconditions and environment

• Magento version

Tested in 2.4.7-p4 and 2.4.8.
The bug is only present in 2.4.8.

• Anything else that would help a developer reproduce the bug

`[user@cloudhost vendor]$ cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"`

[user@cloudhost vendor]$ free -mh total used free shared buff/cache available Mem: 104G 70G 7.9G 3.3G 25G 29G Swap: 6.0G 3.4G 2.6G

[user@cloudhost vendor]$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 32 On-line CPU(s) list: 0-31 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 32 NUMA node(s): 1 Vendor ID: AuthenticAMD CPU family: 23 Model: 1 Model name: AMD EPYC Processor (with IBPB) Stepping: 2 CPU MHz: 2994.372 BogoMIPS: 5988.74 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 64K L2 cache: 512K L3 cache: 8192K NUMA node0 CPU(s): 0-31 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm rep_good nopl cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext perfctr_core ssbd ibrs ibpb stibp vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 virt_ssbd arat umip

[user@cloudhost vendor]$ httpd -v Server version: Apache/2.4.54 (CentOS) Server built: Aug 12 2022 20:16:29

[a19b88da@cloudhost-2836220 vendor]$ nginx -v nginx version: nginx/1.24.0

Note: Apache serves the application and SSL is terminated with Apache,
NginX is used for reverse proxy caching,

[user@cloudhost vendor]$ mysql -V mysql Ver 15.1 Distrib 10.5.16-MariaDB, for Linux (x86_64) using readline 5.1

[user@cloudhost vendor]$ php -v PHP 8.3.8 (cli) (built: Jun 4 2024 14:53:17) (NTS gcc x86_64) Copyright (c) The PHP Group Zend Engine v4.3.8, Copyright (c) Zend Technologies with Zend OPcache v8.3.8, Copyright (c), by Zend Technologies

└─$ systemctl status php83-php-fpm.service ● php83-php-fpm.service - The PHP FastCGI Process Manager Loaded: loaded (/usr/lib/systemd/system/php83-php-fpm.service; enabled; vendor preset: disabled) Active: active (running) since Tue 2025-06-10 15:16:56 UTC; 2 weeks 4 days ago Main PID: 14345 (php-fpm) Status: "Processes active: 0, idle: 0, Requests: 4327, slow: 0, Traffic: 0.00req/sec" Tasks: 23 Memory: 64.9M CGroup: /system.slice/php83-php-fpm.service ├─14345 php-fpm: master process (/etc/opt/remi/php83/php-fpm.conf) ├─14358 /usr/bin/newrelic-daemon --agent --pidfile /var/run/php83-newrelic-daemon.pid --logfile /var/log/newrelic/php83-newrelic-daemon.log --po... └─14364 /usr/bin/newrelic-daemon --agent --pidfile /var/run/php83-newrelic-daemon.pid --logfile /var/log/newrelic/php83-newrelic-daemon.log --po...

└─$ dovecot --version 2.3.10.1 (a3d0e1171)

Steps to reproduce

1. Install Mageplaza-smtp

composer require mageplaza/module-smtp php bin/magento setup:upgrade php bin/magento setup:static-content:deploy

2. Try to add a TLS connection using port 587 to the Mageplaza-smtp configuration:

3. When you run the "Send Test Email" the following error is generated:

4. I narrowed the problem down to two composer modules:

[user@cloudhost vendor]$ grep -r 'ssl://' symfony/ symfony/http-client/HttpClientTrait.php: $proxyUrl = 'ssl://'.$proxy['host'].':'.($proxy['port'] ?? '443'); symfony/mailer/Transport/Smtp/Stream/SocketStream.php: $this->url = 'ssl://'.$this->url;

5. Removing the string 'ssl://'. from both files resolves the issue.

Note: Both these composer modules are present in both 2.4.7-p4 and 2.4.8.

Expected result

I expect the email to send and the test to succeed.

Actual result

error message shown in screenshot above.

Additional information

will provide later

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @maximus-sallam. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce.

• For more details, review the Magento Contributor Assistant documentation.
• Add a comment to assign the issue: @magento I am working on this
• To learn more about issue processing workflow, refer to the Code Contributions.

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