An error occurs when configuring WP SMTP

brnwp
(@brnwp)

3 days, 11 hours ago

Hi. I’ve got a big problem – I can’t send emails from the website https://crabbymilano.com/wp-admin/

If I try to request a new password, this is the message you’ll see:
Error: The email cannot be sent. The site may not be configured correctly to send emails. Please contact support to reset your password.

The site is hosted on SiteGround and we’ve tried installing WP SMTP but it gives an error, and SiteGround’s technical support team have asked me to bring the issue to your attention: the server defaults to a single slash (/), tries to find an account called / on your server, realises it doesn’t exist, and abruptly terminates the connection when you try to specify a recipient (RCPT TO).

Please investigate this issue and help us set the MAIL FROM: value to crabbymilano@crabbymilano.com

The error log follows:

Versions: WordPress: 7.0 WordPress MS: No PHP: 8.2.31 WP Mail SMTP: 4.8.0 Settings: Mailer: smtp Constants: No ErrorInfo: SMTP error: the following recipients failed: bruno.cover@gmail.com : Sorry 35.214.243.211. The ‘MAIL FROM’ email address you are using is not hosted on this server. I tried using / as the sender’s email address. Sending is not permitted from addresses not hosted on our server. Please check your email client’s ‘MAIL FROM’ settings and ensure you set the ‘MAIL FROM’ address to an email account hosted on the server. Host: gnldm1060.siteground.biz Port: 587 SMTPSecure: tls SMTPAutoTLS: bool(true) SMTPAuth: bool(true) Server: OpenSSL: OpenSSL 3.5.4 30 Sep 2025 Apache.mod_security: No Debug: Email source: WP Mail SMTP Mailer: Other SMTP PHPMailer was able to connect to the SMTP server, but failed whilst attempting to send an email. Email source: WP Mail SMTP Mailer: Other SMTP SMTP error: the following recipients failed: bruno.cover@gmail.com: Sorry 35.214.243.211. The ‘MAIL FROM’ email address you are using is not hosted on this server. I tried using / as the sender’s email address. Sending is not permitted from addresses not hosted on our server. Please check your email client’s ‘MAIL FROM’ settings and ensure you set the ‘MAIL FROM’ address to a hosted email account.

Thanks a lot for your support. Best regards. Bruno

The page I need help with: [log in to see the link]

Viewing 2 replies - 1 through 2 (of 2 total)

Thread Starter brnwp
(@brnwp)

3 days, 5 hours ago

WP Mail SMTP Debug Events

Heads up! The last email your site attempted to send was unsuccessful.

Email Source: WP Core Mailer: Altro SMTP SMTP Error: The following recipients failed: bruno.cover@gmail.com: Sorry 35.214.243.211. The “MAIL FROM” email address / you are using is not hosted on this server. Tried to use / as mail from address. Sending mails from addresses not hosted on our server is not allowed. Please check the “MAIL FROM” settings of your mail client and make sure you set the “MAIL FROM” address to an email account which is hosted on the server.

For more details please try running an Email Test or reading the latest error event.

Thread Starter brnwp
(@brnwp)

7 hours, 28 minutes ago

The solution, via SiteGround support_^

“Upon examining the wp-content/mu-plugins/ directory, I found a file named smtp-config.php on your main site and on the staging copies. This file was attempting to force the SMTP settings using undefined system variables, which resulted in the “MAIL FROM” address being passed as an empty value. This generated the following error when attempting to send emails:
ErrorInfo: SMTP Error: The following recipients failed: mail-check@siteground.com: Sorry 35.214.243.211. The ‘MAIL FROM’ email address / you are using is not hosted on this server. Tried to use / as mail from address.

To resolve this issue, the smtp-config.php file should be renamed or removed to allow your plugin’s saved settings to take effect without interference.”

Viewing 2 replies - 1 through 2 (of 2 total)

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