Edit History

On 8/19/2025 at 10:52 PM, Mehdi Bourechka said:

Yes, exactly. Your SMTP settings must match the sender email. If your SMTP username is [email protected], then the Sender (From) email configured in PrestaShop must be the same or another address accepted by that SMTP server. Otherwise, the SMTP server will reject the email with a “sender not allowed” error.

SMTP servers typically enforce that the From address matches the authenticated account (or falls under the same domain or alias).

If you’re using SMTP username = [email protected], but the Sender configured in PrestaShop is [email protected], this mismatch may trigger security restrictions and the “550 … Sender not allowed” error.

To fix this:

Update the From address in PrestaShop’s mail settings to [email protected], or

Use an SMTP account that corresponds exactly to the desired sender email

UPDATE... 

Tried and did not work... error is: 

Error: Please check your configuration

Expected response code 250 but got code "550", with message "550 5.1.0 p67DuN4geD5sdp67Du8wjC - Mittente non consentito / Sender not allowed ( mail from ) "

Even with email domain name mydomain.com, smtp username [email protected] and smtp password mypassword

On 8/19/2025 at 10:52 PM, Mehdi Bourechka said:

Yes, exactly. Your SMTP settings must match the sender email. If your SMTP username is [email protected], then the Sender (From) email configured in PrestaShop must be the same or another address accepted by that SMTP server. Otherwise, the SMTP server will reject the email with a “sender not allowed” error.

SMTP servers typically enforce that the From address matches the authenticated account (or falls under the same domain or alias).

If you’re using SMTP username = [email protected], but the Sender configured in PrestaShop is [email protected], this mismatch may trigger security restrictions and the “550 … Sender not allowed” error.

To fix this:

Update the From address in PrestaShop’s mail settings to [email protected], or

Use an SMTP account that corresponds exactly to the desired sender email

UPDATE... 

Tried and did not work... error is: 

Error: Please check your configuration

Expected response code 250 but got code "550", with message "550 5.1.0 p67DuN4geD5sdp67Du8wjC - Mittente non consentito / Sender not allowed ( mail from ) "

Even with email domain name mydomain.com and smtp username [email protected] and smtp password mypassword

On 8/19/2025 at 10:52 PM, Mehdi Bourechka said:

Yes, exactly. Your SMTP settings must match the sender email. If your SMTP username is [email protected], then the Sender (From) email configured in PrestaShop must be the same or another address accepted by that SMTP server. Otherwise, the SMTP server will reject the email with a “sender not allowed” error.

SMTP servers typically enforce that the From address matches the authenticated account (or falls under the same domain or alias).

If you’re using SMTP username = [email protected], but the Sender configured in PrestaShop is [email protected], this mismatch may trigger security restrictions and the “550 … Sender not allowed” error.

To fix this:

Update the From address in PrestaShop’s mail settings to [email protected], or

Use an SMTP account that corresponds exactly to the desired sender email

UPDATE... 

Tried and did not work... error is: 

Error: Please check your configuration

Expected response code 250 but got code "550", with message "550 5.1.0 p67DuN4geD5sdp67Du8wjC - Mittente non consentito / Sender not allowed ( mail from ) "

Even with email domain name mydomain.com and smtp username [email protected] and smtp password mypassword