phpmailer error Could not instantiate mail function

Question

I m using the mail   basic example modified slightly for my user id and I m getting the error  Mailer Error  Could not instantiate mail function   if I use the mail function  -   mail  to   subject   message   headers     it works fine  though I m having trouble sending html  which is why I m trying PHPMailer   this is the code    lt  php require once     class phpmailer php          mail               new PHPMailer       defaults to using php  mail         body               file get contents  contents html         body               eregi replace           body           print   body       to verify that I got the html      mail- gt AddReplyTo  reply domain com   my name         mail- gt SetFrom  from domain com    my name         address    to domain com        mail- gt AddAddress  address   her name         mail- gt Subject       PHPMailer Test Subject via mail    basic        mail- gt AltBody       To view the message  please use an HTML compatible email viewer         mail- gt MsgHTML  body        mail- gt AddAttachment  images phpmailer gif            attachment      mail- gt AddAttachment  images phpmailer mini gif       attachment      if   mail- gt Send              echo  Mailer Error       mail- gt ErrorInfo        else           echo  Message sent            gt

User · Answer

My config  IIS   php7 4 I had the same issue as  Salman-A  where small attachments were emailed but large were causing the page to error out  I have increased file and attachments limits in php ini  but this has made no difference  Then I found a configuration in IIS 6 0   and increased file limits in there   Also here is my mail php  use PHPMailer PHPMailer PHPMailer  use PHPMailer PHPMailer Exception  require      PHPMailer-master src Exception php   require      PHPMailer-master src PHPMailer php    try       email   new PHPMailer true        email- gt SetFrom  internal email com    optional name         email- gt isHTML true        email- gt Subject      my subject        email- gt Body         emailContent       email- gt AddAddress   eml to           email- gt AddAttachment   file to attach         email- gt Send       catch phpmailerException  e  echo  e- gt errorMessage      I hope this helps someone in the future

User · Answer

Your code looks good  did you forget to install PostFix on your server   sudo apt-get install postfix   It worked for me     Cheers

User · Answer

Try using SMTP to send email -   mail- gt IsSMTP     mail- gt Host    smtp example com       optional    used only when SMTP requires authentication    mail- gt SMTPAuth   true   mail- gt Username    smtp username    mail- gt Password    smtp password

User · Answer

Seems in my case it was just SERVER REJECTION  Please check your mail server log   smtp connection accessibility

User · Answer

In my case  it was the attachment size limit that causes the issue  Check and increase the size limit of mail worked for me

User · Answer

This worked for me   mail- gt SetFrom  from domain co   my name   0     notice the third parameter

User · Answer

Check if sendmail is enabled  mostly if your server is provided by another company

User · Answer

An old thread  but it may help someone like me  I resolved the issue by setting up SMTP server value to a legitimate value in PHP ini

User · Answer

We nee to change the values of  SMTP  in php ini file php ini file is located into   EasyPHP-DevServer-14 1VC11 binaries php php runningversion php ini

User · Answer

I had this issue  and after doing some debugging  and searching I realized that the SERVER  Godaddy  can have issues   I recommend you contact your Web hosting Provider and talk to them about Quota Restrictions on the mail function  They do this to prevent people doing spam bots or mass emailing  spam      They may be able to advise you of their limits  and if you re exceeding them  You can also possibly upgrade limit by going to private server   After talking with GoDaddy for 15 minutes the tech support was able to resolve this within 20 minutes   This helped me out a lot  and I wanted to share it so if someone else comes across this they can try this method if all fails  or before they try anything else

User · Answer

I was having this issue while sending files with regional characters in their names like  VeryRegi  nal file - name pdf   The solution was to clear filename before attaching it to the email

User · Answer

If you are sending file attachments and your code works for small attachments but fails for large attachments   If you get the error  Could not instantiate mail function  error when you try to send large emails and your PHP error log contains the message  Cannot send message  Too big  then your mail transfer agent  sendmail  postfix  exim  etc  is refusing to deliver these emails   The solution is to configure the MTA to allow larger attachments  But this is not always possible  The alternate solution is to use SMTP  You will need access to a SMTP server  and login credentials if your SMTP server requires authentication     mail               new PHPMailer     mail- gt IsSMTP                                 telling the class to use SMTP  mail- gt SMTPAuth     true                      enable SMTP authentication  mail- gt Host          mail yourdomain com      set the SMTP server  mail- gt Port         26                        set the SMTP port  mail- gt Username      yourname yourdomain      SMTP account username  mail- gt Password      yourpassword             SMTP account password   PHPMailer defaults to using PHP mail   function which uses settings from php ini which normally defaults to use sendmail  or something similar   In the above example we override the default behavior

User · Answer

You need to make sure that your from address is a valid email account setup on that server

User · Answer

For what it s worth I had this issue and had to go into cPanel where I saw the error message    Attention  Please register your email IDs used in non-smtp mails through cpanel plugin  Unregistered email IDs will not be allowed in non-smtp emails sent through scripts  Go to Mail section and find  Registered Mail IDs  plugin in paper lantern theme    Registering the emails in cPanel  Register Mail IDs  and waiting 10 mins got mine to work   Hope that helps someone

User · Answer

mail- gt AddAddress  address   her name      should be changed to    mail- gt AddAddress  address     This worked for my case

User · Answer

I had this issue as well   My solution was to disable selinux   I tried allowing 2 different http settings in selinux  something like httpd allow email and http can connect  and that didn t work  so I just disabled it completely and it started working

User · Answer

The PHPMailer help docs on this specific error helped to get me on the right path   What we found is that php ini did not have the sendmail path defined  so I added that with sendmail path    usr sbin sendmail -t -i

[php] phpmailer error "Could not instantiate mail function"

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