Mailjet blog
Deliverability
Everything you need to start building connections that matter.
![Hermes delivers an email to a goddess next to a big number three over a green background.](https://images.ctfassets.net/y6oq7udscnj8/1MPoNpyEHsooDzyfp5olGH/387bd3c58a2f4e8a6e6ef09aa89efd79/Email-Deliverability-Configura-DKIM-en-3-pasos.png?w=2048&h=960&q=50&fm=png)
Deliverability
10 min
DKIM setup: How to create, configure, and set up DKIM in 3 easy steps
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![Hermes on a moped delivering mail to a mailbox](https://images.ctfassets.net/y6oq7udscnj8/12GCL6VfdtTHoqT10xxe61/38806bb8c887f565679e8f0e35389791/Deliverability_6_-_Version_4.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
11 min
Double opt-in vs. Single opt-in: Which one should you use?
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![Hermes and Hera in front of the mailboxes](https://images.ctfassets.net/y6oq7udscnj8/pGTnj9u8qWLFWAHOA3hl7/6e0c834b543b52b29bc91bd99c980334/-_Deliverability_1_-_Version_2.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
7 min
Noreply email address: Best practices for your email strategy
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![Hermes riding the sleigh](https://images.ctfassets.net/y6oq7udscnj8/4rfXlPW4DrgxlWkm35IigV/e75ff13610ba7dc56bef8728fbc7ef2c/Holiday_Season_1_-_Version_2.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
10 min
Deliverability tips to avoid the spam folder this holiday season
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![Hermes gives a letter to a Goddess](https://images.ctfassets.net/y6oq7udscnj8/4oiVWpzjZ98dsHgaj4u2MA/7ef66ab5870ba094f9e31e6f830348bc/Deliverability_2_-_Version_8.png?w=2048&h=960&q=50&fm=png)
Deliverability
8 min
Unsubscribe link: Why it’s critical for your email marketing campaigns
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![Hermes with a picture and Hera with a brush](https://images.ctfassets.net/y6oq7udscnj8/6t4JSqxOdodL80ujIr920V/cbe97df4d060951baafae3ee200eb32d/Email_Design_2_-_Version_1.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
5 min
Email file sizes: How big is too big?
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![cw_27_What_is_quishing](https://images.ctfassets.net/y6oq7udscnj8/4392POLjMOj5ydC4442XXb/a6afd02002b0309fdbe302daeb294f99/cw_27_What_is_quishing.png?w=1330&h=623&q=50&fm=png)
Deliverability
7 min
What is quishing? The rise of QR code phishing attacks
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![A masked Hermes is doing something evil with email](https://images.ctfassets.net/y6oq7udscnj8/56eF5HBkXnrlQNz8gI5qJs/e086ca3b2c8b74ed77fada11e3460c77/Email_Deliverability_4_-_Version_1.png?w=2048&h=960&q=50&fm=png)
Deliverability
19 min
What is phishing?
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![Gods doing security check](https://images.ctfassets.net/y6oq7udscnj8/DrMlhIWyCD9jflxjnjXwZ/18d49362668e3d08114d6daa88f9fe44/Security___Data_protection_5_-_Version_2.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
13 min
What is DMARC and how does it work
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![Cerberus with a lock in front of a computer](https://images.ctfassets.net/y6oq7udscnj8/2DrbpcOpIgu9YtUp1WWtdr/77603e765c215f9fe45970f1f4beb7c8/24cw22_-_Blog_Header_-_DKIM_1024_vs_2048.jpg?w=2160&h=1440&fl=progressive&q=50&fm=jpg)
Marketing
6 min
Why choose DKIM 2048 over 1024?
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![Hermes asking for directions](https://images.ctfassets.net/y6oq7udscnj8/uXPgDLNAueNVmtH49ZGvz/d0e784050eef6ea2753204ab26ef9d93/Deliverability_3_-_Version_3.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
8 min
What is the return-path email header and why do you need to customize it?
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![God wondering next to laptop and paper airplane](https://images.ctfassets.net/y6oq7udscnj8/7BByHadoaGFzVqinCD6iCc/25b25af2c9ed32ed3223f688d279e741/Deliverability_3_-_Version_8.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
7 min
All you need to know about transactional email
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![Two Greek gods with Cerberus in front of a laptop](https://images.ctfassets.net/y6oq7udscnj8/29zdH8DRz9a816OOnYBJjU/4391ac107f5bc6aa661ab280374f2db6/How_can_email_marketers_increase_brand_trust_in_a_cluttered_inbox.png?w=1330&h=623&q=50&fm=png)
Deliverability
7 min
How can email marketers increase brand trust in a cluttered inbox?
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![Hermes delivers a letter to Hera](https://images.ctfassets.net/y6oq7udscnj8/BtYWASC8DPu4oQvn81AkR/8aad0db1489ba0cd32890dd9610118a6/Deliverability_1_-_Version_3.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
9 min
What is the Gmail automated unsubscribe feature?
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![Hermes delivering letter in front of screens](https://images.ctfassets.net/y6oq7udscnj8/FH42KajoxFcIFbvOhcCiF/187b5d528da490994eaed878ba143ef4/Deliverability_2_-_Version_5.png?w=2048&h=960&q=50&fm=png)
Deliverability
8 min
Email authentication: What you need to know about DMARC, SPF, DKIM, and BIMI
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![Hermes sitting in front of a fireplace](https://images.ctfassets.net/y6oq7udscnj8/2prBLR70mf38xrQiXrMiD1/68499f80a906331db4d5cecc7583c651/MJ-Email-deliverability-fireside-chat-Yahoo-Google.png?w=1330&h=623&q=50&fm=png)
Deliverability
6 min
Understanding new sender requirements: A fireside chat with Yahoo & Google
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![Hermes wonders about emails](https://images.ctfassets.net/y6oq7udscnj8/4RYUy8c8SQCfABzlD1abGM/2bb0e1640d6075601ad9f4aa06f3f861/Deliverability_3_-_Version_1.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
7 min
Email headers: What are they and how to read them
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![Greek god and goddesses by a laptop](https://images.ctfassets.net/y6oq7udscnj8/1tHRvjySoRhb02j65ESe7r/952eb60a2894380b9a044345c485a8f7/Blog-MJ-authentification.png?w=2160&h=1440&q=50&fm=png)
Deliverability
10 min
Breaking down a DMARC record: What it is and how it looks like
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![Satisfied customer receives email](https://images.ctfassets.net/y6oq7udscnj8/7dbcaTFXcucqldibYQAz9s/e37e2c23d5e09be50bf10455d6fa6b74/MJ-Email-Deliverabilty-ideal-customer-experience.png?w=1024&h=480&q=50&fm=png)
Deliverability
10 min
Why email deliverability issues will ruin the customer experience
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![Hermes writing in front of laptop](https://images.ctfassets.net/y6oq7udscnj8/3mkXZ2H4WSqLzeX4Rz6WR5/766655037434fb21e7be39dd36efa326/Email_Marketing_2_-_Version_10.png?w=2048&h=960&q=50&fm=png)
Deliverability
6 min
Gmail and Yahoo’s 2024 inbox protections and what they mean for your email program
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![Hermes delivers email to a Greek goddess](https://images.ctfassets.net/y6oq7udscnj8/4FW4zhLwS0EQUIj0LaWigm/26b2ba668d95b95f4b32ae4d05aa1631/MJ-Email-Deliverability-01-Improve-Deliverability-Marketer.png?w=1024&h=480&q=50&fm=png)
Deliverability
9 min
What do marketers need to know about email deliverability?
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![Hermes dancing on a laptop next to a mug](https://images.ctfassets.net/y6oq7udscnj8/1U13m7sPMRW3tmx2f3mVF1/9c3de33e289a3fd33b4dacd91f4311a9/Deliverability_5_-_Version_1.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
17 min
How to avoid email spam filters
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![Hermes delivers a letter to Hera](https://images.ctfassets.net/y6oq7udscnj8/BtYWASC8DPu4oQvn81AkR/8aad0db1489ba0cd32890dd9610118a6/Deliverability_1_-_Version_3.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
7 min
Gmail Promotions tab: A guide to optimize email delivery
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![Hermes passing the box with envelopes to Hera](https://images.ctfassets.net/y6oq7udscnj8/7enHE6KHgwTePwVPR1G2WM/f33265b55310d75d938c1c09bc7799ab/Deliverability_7_-_Version_7.jpg?w=2048&h=960&fl=progressive&q=50&fm=jpg)
Deliverability
6 min
Buying email lists doesn’t guarantee improved results
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