Added information about stealth blocks on port 25

This commit is contained in:
Trangar 2020-07-15 08:32:38 +02:00
parent 68e9e5dd36
commit c6f1af4fff

View file

@ -51,4 +51,12 @@ fail2ban-client set postfix addignoreip <client ip>
# this will delete the jails entirely - nuclear option # this will delete the jails entirely - nuclear option
fail2ban-client stop dovecot fail2ban-client stop dovecot
fail2ban-client stop postfix fail2ban-client stop postfix
``` ```
## Send email is never received
Some hosting provides have a stealth block on port 25. Make sure to check with your hosting provider that traffic on port 25 is allowed
Common hosting providers known to have this issue:
- [Azure](https://docs.microsoft.com/en-us/azure/virtual-network/troubleshoot-outbound-smtp-connectivity)
- [AWS EC2](https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/)