Sending mass email using PHP

Question

I am currently writing a music blog  The administrator posts a new article every 2-3 days  Once the administrator posts an article  a mass email will be sent to around 5000 subscribers immediately    What is the best way to implement the mass mail feature   Does the following function work   function massmail         content            foreach   recipients as  r          content    content     lt img src  http   xxx trackOpenRate php id    r    gt        mail  r   subject     content           Another question  If all 5000 subscribers are using Yahoo Mail  will Yahoo treat it as a DDOS attack and block the IP address of my SMTP server

User · Answer

Do not send email to 5 000 people using standard PHP tools  You ll get banned by most ISPs in seconds and never even know it  You should either use some mailing lists software or an Email Service Provider do to this

User · Answer

You may consider using CRON for that kind of operation  Sending mass mail at once is certainly not good  it may be detected as spam  ddos  crash your server etc    So CRON could be a great solution  send 100 mails at once  then wait a few minutes  next 100  etc

User · Answer

I would insert all the emails into a database  sort of like a queue   then process them one at  a time as you have done in your code  if you want to use swiftmailer or phpmailer etc   you can do that too    After each mail is sent  update the database to record the date time it was sent   By putting them in the database first you have    a record of who you sent it to if your script times out or fails and you have to run it again  then you won t end up sending the same email out to people twice you can run the send process from a cron job and do a batch at a time  so that your mail server is not overwhelmed  and keep track of what has been sent   Keep in mind  how to automate bounced emails or invalid emails so they can automatically removed from your list   If you are sending that many emails you are bound to get a few bounces

User · Answer

Also the Pear packages   http   pear php net package Mail Mime http   pear php net package Mail http   pear php net package Mail Queue  sob    PS  DO NOT use mail   to send those 5000 emails  In addition to what everyone else said  it is extremely inefficient since mail   creates a separate socket per email set  even to the same MTA

User · Answer

Also have a look at the PHPmailer class  PHPMailer

User · Answer

You can use swiftmailer for it  By using batch process    lt  php      message   Swift Message  newInstance         - gt setSubject  Let  s get together today          - gt setFrom array  myfrom domain com    gt   From Me          - gt setBody  Here is the message itself         - gt addPart   lt b gt Test message being sent   lt  b gt     text html          data   mysql query  SELECT first  last  email FROM users WHERE is active 1   or die mysql error         while  row   mysql fetch assoc  data                 message- gt addTo  row  email     row  first            row  last                 message- gt batchSend      gt

User · Answer

This is advice  not an answer  You are much  much better off using dedicated mailing list software   mailman is an oft-used example  but something as simple as mlmmj may suffice   Sending mass mails is actually a more difficult task than it actually appears to be   Not only do you have to send the mails  you also have to keep track of  dead  addresses to avoid your mail  or worse  your mailserver  being marked as spam  You have to handle people unsubscribing for much the same reason   You can implement these things yourself  but particularly bounce handling is difficult and unrewarding work   Using a mailing list manager will make things a lot easier   As for how to make your mail palatable for yahoo  that is another matter entirely   For all its faults  they seem to put great stock in SPF and DomainKey   You probably will have to implement them  which will require co-operation from your mail server administrator

User · Answer

First off  using the mail   function that comes with PHP is not an optimal solution  It is easily marked as spammed  and you need to set up header to ensure that you are sending HTML emails correctly  As for whether the code snippet will work  it would  but I doubt you will get HTML code inside it correctly without specifying extra headers   I ll suggest you take a look at SwiftMailer  which has HTML support  support for different mime types and SMTP authentication  which is less likely to mark your mail as spam

User · Answer

I already did it using Lotus Notus and PHP    This solution works if you have access to the mail server or you can request something to the mail server Administrator   1  Create a group in the mail server  Sales Department  2  Assign to the group the accounts you need to be in the group  3  Assign an internet address to the group  salesdept DOMAIN com  4  Create your PHP script using the mail function    to    salesdept DOMAIN com   mail  to   subject   message   headers      It worked for me and all the accounts included in the group receive the mail   The best of the lucks

User · Answer

There is more into it aside from using a software   If you could create a bulk emailer program that sends intermittently   Say if you will send 5 000 recipients  create a loop that would send 38 lists per sending then pause for 10 seconds  I have an actual experience sending 500 manually per days for the past weeks and so far i have good results    Another consideration are the content of your email   Nowadays it is a standard that you need to put your physical office address and the  unsubscribe  opt-out  These are factors that majority of recipient emails servers are checking   If you don t have these they will classify you as spammer     Mailchimp is my best recommendation to use if you want a paid service provider in sending to your email subscriber NOT sending unsolicited or cold email marketing     Hope it helps

User · Answer

Why don t you rather use phplist   It s also built on top of PHP Mailer and a lot of industry leaders are using it  I ve used it myself a couple of times to send out bulk mails to my clients   The nice thing about phplist is that you can throttle your messages on a domain level plus a time limit level     What we ve also done with a couple of internal capture systems we ve got was to push our user base to the mailling list and then have a cron entry triggering a given mail each day   The possibilities are endless  that s the awesome thing about open source

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