Postfix fallback relay

[pb81]

Hi!
It would be nice to add a fallback relay if the server has a bad ip reputation (many use DigitalOcean as a provider).
For example i cannot send mail to hotmail at all

Does someone know how to add the fallback manually whitout breaking the configuration in KeyHelp?

// Paul

[gustavohellwig]

Good idea..

[nikko]

You can use the MSN delisting. But... The last time I have fights over 3 month for delist an IP.

[jcolideles]

You need to edit your postfix conf

/etc/postfix/main.cf

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# specify SMTP relay host
relayhost = [mail.isp.example]:587
smtp_sasl_auth_enable = yes
# disallow methods that allow anonymous authentication.
smtp_sasl_security_options = noanonymous
# where to find sasl_passwd
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
# Enable STARTTLS encryption
smtp_use_tls = yes

For smtp relay credentials
/etc/postfix/sasl_passwd

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[mail.isp.example] username:password

Then run the following commands

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sudo postmap /etc/postfix/sasl_passwd
sudo chown root:root /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db
sudo chmod 0600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db

Restart Postfix

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sudo service postfix restart

You need to manually edit the DNS Records to include your smtp relay on your spf records.

I wish KeyHelp will add a feature where we can customize default DNS records for newly added domains and ability to rate limit emails. BTW, Thank you for the awesome Control Panel