- Check on http://www.anti-abuse.org/multi-rbl-check/
- Check on https://www.dnsbl.info/dnsbl-database-check.php
- Check on uceprotect.net
- Check on SpamHaus: https://www.spamhaus.org/lookup/
- Try sending a mail to some @icloud.com user. Request for whitelisting on CloudMark if blocked: https://csi.cloudmark.com/en/reset/
- Send an email to outlook user. Request for whitelisting if blocked.
Sometimes we need to provide details about how we protect spam.
[My company name] does [this and this].
It sends emails for [this and this purpose].
Protection:
- All emails follow with SPF and DKIM specifications.
- All emails contain "List-Unsubscribe" headers for one-click unsubscribe.
- Have enabled SASL and firewall to send emails only from internal IPs.
- Have registered on Google Postmaster and Outlook's SNDS to track IP reputation.
- All complaints and bounces are immediately dealt with.
Quality:
- We email only registered users who ask for email updates.
- We have not purchased any email list.Sometimes we need to provide details about what has changed:
Hi,
It seems <service provide> is blocking emails from our email server with IP <this.this.this.this>.
We shifted hour hosting to <this-this-host> on <this-date>. We have enabled firewalls and taken all the protection to prevent any spam from this ip.