[wp-trac] [WordPress Trac] #64368: `Could not instantiate mail function` errors sending mail in 6.9

[WordPress Trac]

#64368: `Could not instantiate mail function` errors sending mail in 6.9
--------------------------+-----------------------
 Reporter:  desrosj       |       Owner:  SirLouen
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  6.9.1
Component:  Mail          |     Version:  6.9
 Severity:  normal        |  Resolution:
 Keywords:  close         |     Focuses:
--------------------------+-----------------------

Comment (by siliconforks):

 Replying to [comment:12 SirLouen]:
 > > It looks like he is setting $phpmailer->Sendmail to a complete command
 line, with options?
 >
 > No, I asked him to set the `$phpmailer->isSendmail()` method (not
 `$phpmailer->Sendmail`), just to check if his sendmail binary was working.
 But then I forgot that the `popen` PHP function could be restricted in his
 web host, so basically it was a useless test and I asked him to revert.

 If you just call `$phpmailer->isSendmail()`, and it fails for some reason,
 you should get an error message like this:

 {{{
 Could not execute: /usr/sbin/sendmail
 }}}

 But that's not what he got, right?  You said he got the following:

 {{{
 Could not execute: /usr/sbin/sendmail -finfo at domain.name -t -i
 }}}

 I think the only way to get an error message like that is to do this:

 {{{#!php
 <?php
 $phpmailer->isSendmail();
 $phpmailer->Sendmail = '/usr/sbin/sendmail -finfo at domain.name -t -i';
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/64368#comment:13>
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