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ADAnirban Dasanir-smtpmaster.hashnode.dev5d ago · 14 min read

Mail Routing Loop: Causes, Too Many Hops Errors, and How to Fix It

Introduction Email normally follows a clear path from the sender’s mail server to the recipient’s inbox. But when routing settings are misconfigured, a message can get stuck moving back and forth betw

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HFHussain Fakhruddinsultanbyte.com6d ago · 9 min read

Arabic domain names and email: a production checklist for MENA products

A signup form can accept مستخدم@مثال.السعودية and still fail everywhere that matters next: validation, storage, password reset, CRM sync, support tooling or SMTP delivery. The problem is usually a blu

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HFHaider Farooqhaiderfarooq.hashnode.devAug 21 · 2 min read

What Building an AI Email Assistant Taught Me About Trust in Automation

At Infolyze I built Emmy, an AI Gmail assistant that runs 24/7: it sorts the inbox, creates labels, drafts replies, and learns each user’s habits over time. It was one of four AI products I shipped th

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HFHussain Fakhruddinsultanbyte.comAug 17 · 9 min read

Arabic Domains and Email in Production: An IDNA and SMTPUTF8 Guide

The @ character is an architectural boundary. IDNA handles the domain on the right; SMTPUTF8 carries an internationalized mailbox on the left. Consider the illustrative address مستخدم@مثال.إختبار. The

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BBlueticksblueticks.hashnode.devAug 11 · 5 min read

Why does my email show as opened twice? Seven things that produce a second open

Short answer: most of the time, they opened it twice. That is the boring explanation and it is usually the right one. But an open is not a reading, it is a fetch of an image, and there are at least si

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BBlueticksblueticks.hashnode.devAug 11 · 5 min read

If I undo send in Gmail, does my email tracker still count the message as sent?

Short answer: it depends on when the tracker writes its record, and most of them do not tell you which choice they made. If it records at the moment you press send, a cancelled message can leave a row

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BBlueticksblueticks.hashnode.devAug 11 · 5 min read

What an open tells you when you sent the same email to five people, and what it cannot tell you at all

Open tracking puts a unique image reference in a message and shows the sender the requests for that image. With one recipient, the ambiguity is manageable and fairly well known: an open means someone

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BBlueticksblueticks.hashnode.devAug 10 · 5 min read

What happens to a tracked email when it gets forwarded, and who the open is attributed to

Open tracking works by putting a unique image reference in a message. The identifier belongs to the message, and everything the sender later sees is a query against requests for that identifier. Forwa

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BBlueticksblueticks.hashnode.devAug 10 · 5 min read

What the timestamp on an email open actually measures, and the four ways it drifts

Every open tracking tool shows you a time. Opened at 09:14. It looks like the most solid part of the whole feature, because a timestamp feels like a fact in a way that a tick does not. It is a fact. I

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BBlueticksblueticks.hashnode.devAug 9 · 5 min read

What an open tracking tool has to store, and the part nobody puts on the landing page

Open tracking looks like a feature. Under it there is a small database, and its shape is forced by the mechanism rather than chosen by the vendor. It is worth knowing what has to be in there, because

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#email

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Trending tags this week

Mail Routing Loop: Causes, Too Many Hops Errors, and How to Fix It

Arabic domain names and email: a production checklist for MENA products

What Building an AI Email Assistant Taught Me About Trust in Automation

Arabic Domains and Email in Production: An IDNA and SMTPUTF8 Guide

Why does my email show as opened twice? Seven things that produce a second open

If I undo send in Gmail, does my email tracker still count the message as sent?

What an open tells you when you sent the same email to five people, and what it cannot tell you at all

What happens to a tracked email when it gets forwarded, and who the open is attributed to

What the timestamp on an email open actually measures, and the four ways it drifts

What an open tracking tool has to store, and the part nobody puts on the landing page