It has and will be an on going research on how to white list our mail server to have those emails going into the proper inbox of the recipient.
Even with perfect configuration of white-listing, SPF and SNDS and RDNS, we need to take important consideration into spam filtering on all your outgoing emails. This is extremely important, as we need to protect our good users from bad users. Also to prevent virus infected pc from sending out spams or viruses.
(This article is a work in progress)
Several options availble:
- SPF (Sender Policy Framework) Record
Setting up custom TXT record to domain to whitelist your mail server for each domain
http://www.openspf.net/
Used by: Gmail, yahoo mail - SNDS (Smart Network Data Services)
Join the White list channel.
This will requires a RDNS to point to your domain, and have postmaster or abuse@yourdomain.com to handle the add to white list
https://postmaster.live.com/snds/FAQ.aspx#WhatIsSNDS
Used by: hotmail and more.. - AuthKey
Used by hotmail - DomainKey
Used by hotmail and yahoo mail - RDNS (Reverse DNS)
Need data center or IP owner to point the ip lookup to domain
Suggestion:
- Setup RDNS
- Setup SNDS
- Setup SPF Record for every domain
- Dmainkey and Authkey
Useful resources:
- Sender score: do check mail server reputation
https://www.senderscore.org/ - Hotmail whitelisting:
https://support.msn.com/eform.aspx?productKey=edfsmsbl&page=support_home_options_form_bye-mail&ct=eformts&lc=1033&st=1&wfxredirect=1 - Gmail whitelisting:
https://support.google.com/mail/bin/answer.py?hl=en&answer=81126
https://support.google.com/mail/bin/request.py?hl=en&contact_type=bulksend&rd=1
No comments:
Post a Comment