[en] The SMTP mail server cannot send emails // [fr] Le serveur mail SMTP ne peut pas envoyer de courriels

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:uk: :us: English version (version française plus bas)

My YunoHost server

Hardware: VPS bought online (OVH)
YunoHost version: 11.0.10.2
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no

Description of my issue

Today I received a mail from the diagnosis with he following content

[ERROR] The SMTP mail server cannot send emails to other servers because outgoing port 25 is blocked in IPv4.
  - You should first try to unblock outgoing port 25 in your internet router interface or your hosting provider interface. (Some hosting providers may require you to send them a support ticket for this).
  - Some providers won't let you unblock outgoing port 25 because they don't care about Net Neutrality.
     - Some of them provide the alternative of using a mail server relay though it implies that the relay will be able to spy on your email traffic.
    - A privacy-friendly alternative is to use a VPN *with a dedicated public IP* to bypass these kinds of limits. See https://yunohost.org/#/vpn_advantage
    - You can also consider switching to a more net neutrality-friendly provider

[ERROR] The SMTP mail server cannot send emails to other servers because outgoing port 25 is blocked in IPv6.
  - You should first try to unblock outgoing port 25 in your internet router interface or your hosting provider interface. (Some hosting providers may require you to send them a support ticket for this).
  - Some providers won't let you unblock outgoing port 25 because they don't care about Net Neutrality.
     - Some of them provide the alternative of using a mail server relay though it implies that the relay will be able to spy on your email traffic.
    - A privacy-friendly alternative is to use a VPN *with a dedicated public IP* to bypass these kinds of limits. See https://yunohost.org/#/vpn_advantage
    - You can also consider switching to a more net neutrality-friendly provider

[ERROR] Your IP or domain 2001:41d0:304:200::8255 is blacklisted on Spam Eating Monkey SEM-IPV6BL
  - The blacklist reason is: "listed, see https://spameatingmonkey.com/lookup/2001:41d0:0304:0200:0000:0000:0000:06c0"
  - After identifying why you are listed and fixing it, feel free to ask for your IP or domain to be removed on https://spameatingmonkey.com/services

I don’t understand why I get this message, I didn’t do anything on my server today.
My yunohost firewall has indeed the port 25 open in IPV4 and IPV6.
I am really able to send an email to another address of mine and it works properly.
I sent an email to the service mail-tester.com and I got a score of 8.2, I lost points with the following point:

SpamAssassin thinks you can improve
-1.985		PYZOR_CHECK		Similar message reported on Pyzor (https://www.pyzor.org)
https://pyzor.readthedocs.io/en/latest/
Please test a real content, test Newsletters will always be flagged by Pyzor
Adjust your message or request whitelisting (https://www.pyzor.org)

I have no clue what I can do to improve.
I don’t think my VPS config is involved, but I may be wrong…

Any help is welcome !

Thanks !

Stan


:fr: Version française

Mon serveur YunoHost

Matériel: VPS acheté en ligne (OVH)
Version de YunoHost: 11.0.10.2
J’ai accès à mon serveur : En SSH | Par la webadmin
Êtes-vous dans un contexte particulier ou avez-vous effectué des modificiations particulières sur votre instance ? : non

Description du problème

Aujourd’hui j’ai reçu un courriel du diagnostic avec le contenu suivant :

[ERROR] The SMTP mail server cannot send emails to other servers because outgoing port 25 is blocked in IPv4.
  - You should first try to unblock outgoing port 25 in your internet router interface or your hosting provider interface. (Some hosting providers may require you to send them a support ticket for this).
  - Some providers won't let you unblock outgoing port 25 because they don't care about Net Neutrality.
     - Some of them provide the alternative of using a mail server relay though it implies that the relay will be able to spy on your email traffic.
    - A privacy-friendly alternative is to use a VPN *with a dedicated public IP* to bypass these kinds of limits. See https://yunohost.org/#/vpn_advantage
    - You can also consider switching to a more net neutrality-friendly provider

[ERROR] The SMTP mail server cannot send emails to other servers because outgoing port 25 is blocked in IPv6.
  - You should first try to unblock outgoing port 25 in your internet router interface or your hosting provider interface. (Some hosting providers may require you to send them a support ticket for this).
  - Some providers won't let you unblock outgoing port 25 because they don't care about Net Neutrality.
     - Some of them provide the alternative of using a mail server relay though it implies that the relay will be able to spy on your email traffic.
    - A privacy-friendly alternative is to use a VPN *with a dedicated public IP* to bypass these kinds of limits. See https://yunohost.org/#/vpn_advantage
    - You can also consider switching to a more net neutrality-friendly provider

[ERROR] Your IP or domain 2001:41d0:304:200::8255 is blacklisted on Spam Eating Monkey SEM-IPV6BL
  - The blacklist reason is: "listed, see https://spameatingmonkey.com/lookup/2001:41d0:0304:0200:0000:0000:0000:06c0"
  - After identifying why you are listed and fixing it, feel free to ask for your IP or domain to be removed on https://spameatingmonkey.com/services

Je ne comprends pas pourquoi je reçois ce message alors que je n’ai pas touché à mon serveur aujourd’hui.
Le firewall yunohost possède bien le port 25 ouvert en IPV4 et IPV6.
I am really able to send an email to another address of mine and it works properly.
Je suis capable d’envoyer des courriels depuis mon serveur jusqu’à une autre adresse hors serveur sans souci.
J’ai envoyé un courriel au service mail-tester.com et j’ai un score de 8.2, j’ai perdu des points principalement pour la raison suivante :

SpamAssassin thinks you can improve
-1.985		PYZOR_CHECK		Similar message reported on Pyzor (https://www.pyzor.org)
https://pyzor.readthedocs.io/en/latest/
Please test a real content, test Newsletters will always be flagged by Pyzor
Adjust your message or request whitelisting (https://www.pyzor.org)

Je n’ai aucune idée de ce que je peux améliorer
Je ne pense pas que la configuration de mon VPS joue un rĂ´le mais je peux me tromper.

Toute aide sera la bienvenue !

Merci !

Stan

Are you using a domain in noho.st nohost.me or ynh.fr ?

So the issue was due to a problem on YunoHost infra (rebooted around 14:43). I have just found the issue and fixed it, the monitoring was crying but we think it was a false positive.

1 Like

I have my own domain name. Thanks to you my diagnosis this morning does not show anymore the error for the port 25 but still the one for spam eating monkey. I will ask the removal of that list.
Thanks a lot!

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