The Deliverable Diary

The short version: Most emails sent through a reputable provider land in seconds. But “slow” doesn’t always mean “broken.” A delay of a few minutes, or sometimes a few hours, can be completely normal depending on what’s going on at the receiving server. This guide shows you what counts as normal, what doesn’t, and exactly […]

Your team spent hours crafting the perfect campaign. The copy is sharp, the segmentation is precise, and the offer is compelling. So why are results disappointing? The culprit might not be your strategy. It could be something far more technical, and far more fixable: email deliverability. For agencies managing campaigns on behalf of multiple clients, […]

You hit Send. The message slid into the Outbox. Then it just sat there. This is one of the oldest, most frustrating bugs in email. We’ve been fixing it for customers since 2006, and the honest truth is that most of the “10 ways to fix Outlook outbox” articles online treat the symptom and skip […]

If you landed here looking for SMTP2GO’s SPF settings, here’s the short version: SMTP2GO handles your SPF for you through a CNAME record on your sender domain, not a traditional TXT include. Add the CNAMEs we provide on your Verified Senders page, and SPF (and DKIM) authenticate automatically. We unpack why a little further down. […]

Email marketing has been declared dead more times than anyone can count. In 2026, it’s still here, still cost-effective, and still the highest-ROI channel most marketing teams have. What’s changed is that the bar to make it work has moved up. Inbox providers are stricter. AI is filtering, summarizing, and ranking your emails before subscribers […]

You hit send. The recipient never gets it. Back comes a wall of text with something like 550 5.7.26 buried in it, and now you have to figure out which part to actually read. Most pages on this topic give you a flat list of errors and a vague “check your DNS.” That’s not enough […]