Note that these days some mail services like Gmail and Yahoo require DKIM/DMARC/SPF to accept incoming email.This morning I managed to get PHP mail working instead of SMTP.
When using SMTP as mailer, your SMTP mail server can add a DKIM signature.
With PHP/Sendmail that's usually not possible.
Hence, with PHP/Sendmail the delivery to external email addresses might be unreliable.
Statistics: Posted by pe7er — Mon Mar 11, 2024 8:20 pm