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antispam Check your abuse addresses

Even if you have excellent policies and an effective, empowered enforcement team you can still have technical problems that can cause you to drop abuse mail, and so lose the opportunity to get a [...] [more]
wordtothewise.com    Spam

antispam Minimal DMARC

What if your recipients have been happily forwarding the mail you send to them to internal mailing lists and alternate accounts and so on for decades? And that forwarding is the sort that’s likely to break DKIM signatures as well as break SPF? And while everyone would advise you not to deploy DMARC p=reject, or at least to roll it out very slowly and carefully with a long monitoring period where you watch what happens with p-none, you have to deploy p=reject real soon now? [...] [more]
wordtothewise.com    Spam, Deliverability

discussion Who are mimecast?

Mimecast is a filter primarily used by businesses. They’re fairly widely used. In some of the data analysis I’ve done for clients, they’re a top 10 or top 20 filter. Earlier today someone asked on Facebook if mimecast may be blocking emails based on the TLD. The short answer is it’s unlikely. I’ve not seen huge issues with them blocking based on TLD of the domain. They’re generally more selective than that. [...] [more]
wordtothewise.com    Deliverability

discussion UCEProtect and GDPR fallout

First thing this morning I got an email from a client that they were listed on the UCEProtect Level 3 blacklist. Mid-morning I got a message from a different client telling me the same thing. Both clients shared their bounce messages with me: 550 Conexion rechazada por estar o167890x0.outbound-mail.sendgrid.net[167.89.0.0]:56628 en la DNSBL dnsbl-3.uceprotect.net  [...] [more]
wordtothewise.com    Deliverability

discussion Widespread Microsoft phishing warnings today

Multiple people have talked to employees inside Microsoft, and I suspect their customers have been blowing up support about this. I know they’re aware, I suspect they’re frantically working on a fix. Update 11 am PDT: It appears this filter is firing when mail has the word “hotmail” in it. This includes if non displaying text (like CSS) has the word in it. It feels like they were attempting to mitigate something and wrote a rule that wasn’t quite right. Still no word on a fix, but don’t panic. [...] [more]
wordtothewise.com    Deliverability

discussion How long does it take to change reputation at Gmail?

Today I was chatting with a potential client who is in the middle of a frustrating warmup at Gmail. They’re doing absolutely the right things, it’s just taking longer than anyone wants. That’s kinda how it is with Gmail, while their algorithm can adapt quickly to changes. Sometimes, like when you’re warming up or trying [...] [more]
wordtothewise.com    Deliverability

discussion What does good IP Reputation get you?

IP Reputation Still Matters, a little. This doesn’t mean senders can, or should ignore IP reputation. Even Gmail looks at IP reputation a little bit. The place IP reputation is primarily used during the SMTP transaction. Good IP reputation does lead to less rate limiting. Senders with good IP reputation can send more mail faster than senders with poor reputation. But once the SMTP transaction is over, IP reputation is just a small factor in a large pool of variables. [...] [more]
wordtothewise.com    Deliverability

discussion Microsoft using the List-Unsubscribe header

An interesting observation from Brian Curry about how Microsoft is using the List Unsubscribe header in their interface. The short version is that Microsoft is only supporting mailto: links. They’re ignoring any List-Unsubscribe links that are a URL. Here are some screenshots. When the sender is using a List-Unsubscribe http:// header, Microsoft states that there is no information on how to help the user unsubscribe, so the offer to block the sender instead. Like in these two messages. [...] [more]
wordtothewise.com    Unsubscribe, Marketing, Deliverability

antispam About that DMARC "exploit"

A security researcher has identified a rendering flaw that allows for “perfect” phishing emails. From his website: Mailsploit is a collection of bugs in email clients that allow effective sender spoofing and code injection attacks. The spoofing is not detected by Mail Transfer Agents (MTA) aka email servers, therefore circumventing spoofing protection mechanisms such as [...] [more]
wordtothewise.com    Spam, Deliverability

discussion Spike in Yahoo error codes

A number of people have mentioned over the last couple weeks that they’re seeing a spike in Yahoo rejecting mail with "554 delivery error: dd Requested mail action aborted". Discussions on various mailing lists indicate these messages are related to inactive accounts. Addresses that bounce at Yahoo with these codes should be handled as inactive addresses and removed from future mailings. [more]
wordtothewise.com    Deliverability

discussion The feds are deploying DMARC

The US National Cybersecurity Assessments & Technical Services Team have issued a mandate on web and email security, including TLS+HSTS for web servers, and STARTTLS+SPF+DKIM+DMARC for email. It’s … pretty decent for a brief, public requirements doc. It’s compatible with a prudent rollout of email authentication. Set up a centralized reporting repository for DMARC failure and aggregate [...] [more]
wordtothewise.com    Deliverability

discussion Sometimes less is more

We just bought some new desks, to replace the old ones that date back to the days of CRT monitors. The supplier we bought them from, Autonomous, did a nice set of triggered sends throughout the sales process – “we’ve received your order”, “we’ve shipped your order”, “your order has been delivered”. That’s not rocket [...] [more]
wordtothewise.com    Automation, Design

discussion Warmup advice for Gmail

Start small. Gmail recommends starting out with 10 – 20 emails at a time. They mean it. You can send this low number of emails every few hours, so you’re not stuck at 10 emails per day. Do not try to send even 100 emails on your first send for a new IP / domain combination. That mail will end up in the bulk folder. Send to hyper engaged users. Simple engagement isn’t enough. You need to mail those people who are going to miss your mail and track it down if it’s in the bulk folder. Sign up for [...] [more]
wordtothewise.com    Deliverability

discussion Google Postmaster bad IP reputation

There are widespread reports this morning (9/11/17) that Google postmaster tools is showing bad IP reputation for IPs starting on 9/9. This issue is affecting just about everyone. Looking through my client’s postmaster pages, I’m seeing red for IP reputation on every client. Even my clients with generally good reputation are seeing bad reputation since 9/9. [...] [more]
wordtothewise.com    Intelligence, Deliverability

tactics Help! We're on Spamhaus' list

You're listed on Spamhaus! Now what? Spamhaus has many lists, knowing which one you're on is critical to getting off the list. Here's a cheat sheet to help. [...] [more]
wordtothewise.com    Deliverability
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