swiftmailer - How to make SUBJECT Substitutions in Sendgrid Swift SmtpTransport? -

i using swift smtptransport seems recommended way.

however documentation found dos not show how achieve subject substitutions.

• (this using) https://github.com/sendgrid/sendgrid-php-example/blob/master/smtp-php-example.php
• https://github.com/sendgrid/sendgrid-php
• http://swiftmailer.org/docs/sending.html#quick-reference-for-sending-a-message

this answered on github, answering here too, folks future reference.

to use smtpapi substitute subjects, you'll need substitution tags in subject of email , include x-smtpapi header substitution tags defined.

using sendgrid smtpapi library:

<?php ... $message->setsubject('[sendgrid-php-example] owl named %yourname%'); $header           = new smtpapi\header(); $header->addsubstitution("%yourname%", array("mr. owl"))-> ...