Spam Filter Isp Speed' title='Spam Filter Isp Speed' />How to send emails and avoid them being classified as spam Example situation You have a server running a PHP website for example. And you notice that your emails are not always delivered. Big problem if youre a shop owner, and the customers dont receive the emails after a purchase. If you follow all the following steps, it should solve 9. I first thought it was possible to do only a few of them, and skip DKIM for example, but finally all of them were required to solve all the problems I had. First of all, who is sending emails When your PHP code sends emails, its often with the famous PHP function mail. But what does this function do, under the hood Lets run a test. You will get for example usrsbinsendmail t i. Mon, Nov 06, 2017. Comment only for now. Switched today to TekSavvy 5MBps DSL plan after xx years of stable service at extra cost with Bell. Switch went well. Spam Filter Isp Speed' title='Spam Filter Isp Speed' />Good news, now we know which program really handles the emails Now a tricky info the name sendmail can be various programs. Even if you see sendmail in the previous step, you might have sendmail or postfix or exim, or qmail. Lets do dpkg S usrsbinsendmail. Find out what Bell residential Internet plans and packages are available in your area. Choose from Bell Fibe Internet, Rural Internet or Wireless Internet services. Lavasoft Registry Tuner Speed Computer Fix, Clean LAVASOFT REGISTRY TUNER SPEED COMPUTER And Optimize PC SPEED Up Your PC FREE Scan Now Working with headphones on usually means youd rather not be bothered, but sometimes it means youre just listening to something while you work. If you want to be. The answer is postfix usrsbinsendmail, ok this means we have postfix installed. Look in the log file varmailwww data to know which emails have not been correctly sent, and why. This might be useful for next steps. As mentioned on Jeff Atwoods blog, its time to look at reverse PTR records. More details to be added here. Add the following line in the postfix config file etcpostfixmain. Then restart postfix with service restart postfix. Nickelodeon Rugrats Elevator Game more. Why Because I had problems like this when the recipient is gmail Our system has detected that this message does 5. IPv. 6 sending guidelines regarding PTR records and 5. Please review 5. 50 5. The easiest solution was then to switch postfix to ipv. SPF DNS records. In order to prove that you are allowed to send emails from example. SPF record in the DNS records of the domain example. I found somewhere that The DNS record type 9. SPF has been deprecated, so we use a TXT record instead. Lets add this as a TXT DNS record see also note 1 vspf. Why these includesBecause my server wont be the only one to send emails from example. I configured Gmail to Send mail as contactexample. SMTP provider Sendgrid. If I dont add these include, Gmail wouldnt be allowed to send email from example. DKIM digital signature. As mentioned here, DKIMs goal is to ensure that mail content hasnt tampered during transmission. Here is the installation process in Ubuntu useful guide here too apt get install opendkim opendkim tools. Create the keys you can also generate keys and the relevant DNS TXT record with http dkimcore. Lets put this in etcopendkim. Syslog yes. Domain. Key. File etcopendkimmail. Selector mail. Auto. Restart yes. Background yes. Canonicalization relaxedrelaxed. DNSTimeout 5. Mode sv. Sub. Domains no. SOCKETinet 8. Ubuntu default listen on loopback on port 8. DKIM. milterdefaultaction accept. Now lets add the public key found in etcopendkimmail. DNS records of your domain mail. IN TXT vDKIM1 krsa pOq. YHd. wa. Pa. QAX. Here is how it looks like with my registrar Namelynx Last step for DKIM restart the mail services with service restart opendkim service restart postfix. Test if everything works. The easiest method is to send an email via PHP to auth resultsverifier. Port. 25 Solutions emailfrom Example lt contactexample. MIME Version 1. Content Transfer Encoding 8bit n. Content type textplain charsetutf 8n. Reply To. emailfrom. Nus Er Failed there. From. emailfrom. Bcc examplegmail. Hello, Hello, headers. Then see the answer of this tool, it should look like this. Summary of Results. SPF check pass. DKIM check pass. Spam. Assassin check ham. The service mail tester. Optional Try postmaster. I used it but I dont remember if it helped or not. If it still doesnt work, a solution could be to outsource email with a professional solution, to avoid days and nights of unsuccessful debugging. Here is a good article about this. Here is a quote Sending emails from your app can s. Half the time, messages that get sent from your own server just get dumped into the recipients junk folder. I sadly discovered true, after weeks of tweaking.