The KALI Journal
Email Deliverability
Email authentication, sender reputation, and inbox placement for sales outreach
2026-07-15 8 min read SPF, DKIM, and DMARC for Cold Calendar Invite Deliverability: The Authentication Setup Guide Calendar invites ride on email, so they live or die by email authentication. Here is how SPF, DKIM, and DMARC decide whether your cold invites reach the inbox or vanish into spam. 
2026-07-11 8 min read Calendar Invite Deliverability: How Gmail, Outlook, and Apple Calendar Handle Cold Invites Differently A cold calendar invite does not render the same way for every prospect. Gmail, Outlook, and Apple Calendar each parse, place, and display invites differently, and those differences quietly change your acceptance rate. Here is what happens in each client and how to send invites that show up clean everywhere. 
2026-06-29 7 min read Verify Your Email List Before Sending Cold Calendar Invites Cold calendar invites only land when the address behind them is real. Here is why list verification protects your sender reputation, your acceptance rates, and the whole calendar channel. 
2026-06-27 8 min read How to Warm Up a New Account for Cold Calendar Invite Outreach A new sending account that fires invites at full volume on day one gets throttled or filtered. Here is a 3-week warmup plan that builds sender reputation before you scale calendar invite outreach. 
2026-06-17 7 min read How Many Cold Calendar Invites Can You Send Per Day Without Tanking Your Domain There is no single magic number, but there is a safe ramp. Here is how to set daily calendar invite volume by mailbox age, why blasting hurts even when invites land, and the throttling rules that keep your domain healthy. 
2026-06-08 7 min read Do Cold Calendar Invites Land in Spam? How Invite Deliverability Actually Works Calendar invites travel a different path than cold email, and that path is the reason they get seen. Here is how invite delivery works, where it can still go wrong, and how to keep your invites in front of prospects instead of in a filter. 
2026-03-15 8 min read How to Bypass Email Filters for Sales Outreach (Without Looking Like Spam) Your cold email is getting filtered before prospects ever see it. Here is how to fix authentication, sender reputation, and copy patterns so your outreach lands in the inbox.