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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

discussion From https to http and protocol-relative URLs in email

When you link to an external resource – an image, a javascript file, some css style – from a web page you do so with a URL, usually something like “https://example.com/blahblah.css” or “http://example.com/blahblah.css”. The world is beginning to go all https, all the time, but until recently good practice was to make a web page available via both http and https. [...] [more]
wordtothewise.com    Marketing

discussion Large companies (un?)knowingly hire spammers

This morning, CSO and MacKeeper published joint articles on a massive data leak from a marketing company. This company, River City Media (RCM), failed to put a password on their online backups sometime. This leaked all of the company’s data out to the Internet at large. MacKeeper Security Researcher, Chris Vickery discovered the breach back in December [...] [more]
wordtothewise.com    Listbuilding

discussion Why so many IP addresses?

Hi Laura, Merry Xmas and wishing you a Happy New Year! I recently looked at a popular ESP’s IPv4 space and I was astounded. How does an ESP get an IP allocation of 20,480 IPs? ARIN guidelines do not allow “MX/Mailing” IPs to count towards a valid justification especially in the case when each and [...] [more]
wordtothewise.com    Deliverability

discussion Address Recycling: Truth, myths and realities

We were talking about this on one of the deliverability lists and I told another story. [ISP] recycled addresses once – back when JD was there which must have been, oh, around 2005/6 or so. I heard this directly from JD. It wasn’t done again, but a whole bunch of people just assumed it was an ongoing thing. Since my knowledge was a private conversation between JD and me, I never felt comfortable sharing the information. Given the circumstances, I’ve decided it’s OK to start sharing that end of the [...] [more]
wordtothewise.com    Deliverability

antispam Google and Amazon and B2B spam

And, for recipients, that’s a problem. Spam filters aren’t going to block this sort of mail, as they can’t easily tell it is this sort of mail. It’s coming from Google MTAs, just like a lot of legitimate mail does. In terms of sheer volume it’s dwarfed by botnet sourced mail or dubious B2B manufacturing spam out of Shenzhen. But, unlike most of that, it’s in your inbox, in front of your eyeballs and costing you time and focus. And that’s much more expensive than network infrastructure or mailbox [...] [more]
wordtothewise.com    Spam

 discussion DKIM Canonicalization - or - why Microsoft breaks your mail

Canonicalization is about comparing things to see if they’re the same. Sometimes you want to do a “fuzzy” comparison, to see if two things are interchangeable for your purposes, even if they’re not exactly identical. [...] [more]
wordtothewise.com    Deliverability
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