[SOLVED] PrestaShop mail issues

[Marcofavaretto]

Good evening everybody

 

How can I solve this PrestaShop error? It doesn't send emails

 

Error: Please check your configuration

Expected response code 250 but got code "550", with message "550 5.1.0 o6SFulCdOD5sdo6SFuqmVv - Mittente non consentito / Sender not allowed ( mail from ) "

 

Thanks in advance

Edited August 25 by Marcofavaretto
Highlighted error (see edit history)

[juanrojas]

hi, request the email sending protocol from your server

[Marcofavaretto]

9 hours ago, juanrojas said:

hi, request the email sending protocol from your server

Sorry, did not understand... can you explain better?

It's all configured correctly on server side... 

[Prestashop Addict]

What is your mail configuration in PS?

[Marcofavaretto]

3 hours ago, Prestashop Addict said:

What is your mail configuration in PS?

If I understood assignment correctly, you mean this: 

-set my own parameters

email domain name - mydomain.com

smtp server - smtps.myserver.it

smtp username - [email protected] (but always mine)

smtp password - blank

encryption - ssl

port - 465

With obviously all parameters configured correctly, not like this... 

[Prestashop Addict]

Ok so if your address mail used for smtp is [email protected] but the sender mail is by example [email protected] your SMTP server doesn't allow this. You must use your sender address or an other smtp server.

[Marcofavaretto]

4 hours ago, Prestashop Addict said:

Ok so if your address mail used for smtp is [email protected] but the sender mail is by example [email protected] your SMTP server doesn't allow this. You must use your sender address or an other smtp server.

So, just to be sure, you're telling me that following parameters: 

 

-email domain name

-smtp username

 

Must correspond on domain side as well? 

So... if email domain name is mydomain.com and smtp username is [email protected]... this is a no go for the system? 

 

If I configure it like: 

-email domain name mydomain.com

-smtp username [email protected]

 

Situation becomes a "go"?

Edited August 19 by Marcofavaretto (see edit history)

[Mehdi Bourechka]

2 hours ago, Marcofavaretto said:

So, just to be sure, you're telling me that following parameters: 

 

-email domain name

-smtp username

 

Must correspond on domain side as well? 

So... if email domain name is mydomain.com and smtp username is [email protected]... this is a no go for the system? 

 

If I configure it like: 

-email domain name mydomain.com

-smtp username [email protected]

 

Situation becomes a "go"?

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

[Prestashop Addict]

Don't forget to change your title post by adding [SOLVED] and add a Thanks or Like to the good answer, this will help community.

[Marcofavaretto]

20 minutes ago, Prestashop Addict said:

Don't forget to change your title post by adding [SOLVED] and add a Thanks or Like to the good answer, this will help community.

Once I'll have it tested out, if it works, then I'll add "solved", don't worry

The "thanks" is there

[Marcofavaretto]

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

Edited August 21 by Marcofavaretto (see edit history)

[Prestashop Addict]

The 

il y a 9 minutes, Marcofavaretto a dit :

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

The sender (ie in Shop parameters / Contact must be the same) sample with smtp user [email protected]

[Marcofavaretto]

1 hour ago, Prestashop Addict said:

The 

The sender (ie in Shop parameters / Contact must be the same) sample with smtp user [email protected]

MEGA MEGA JOB! Thank you.

[Marcofavaretto]

16 hours ago, Prestashop Addict said:

The 

The sender (ie in Shop parameters / Contact must be the same) sample with smtp user [email protected]

Issue partially solved

Now the system sends email when following things occur: 

-Customer registration

-Customer order confirmation

-Change of order status

-Customer inserts a message directed to us

 

But it does not send the email when we respond to the customer... even if PrestaShop says "succesfully added"

 

Any idea why? Thanks!