Guard against timeout when checking dns of email addresses #96
Description
I have been experiencing problems while testing a com_connect form on a local webserver with the local mailcatcher Helo (similar to Mailhog and co). On submission, the form stalls and times out after a long while with a 502 bad gateway. The smtp log file and php log files show nothing (the nginx log registers only the 502), and dmp-ing to a debug file also failed.
Eventually, by going back to a simple form and trial and error, I tracked it down to the com_connect_email tag, specifically the
lines 910-913 and 919 in which the DNS of the target email is checked. That was failing and then timing out.
The error is my own fault – my firewall was blocking outgoing connections from php-fpm – however, could the DNS check be made more error-tolerant, ideally returning a message after a certain amount of time has passed? It was hard to identify the problem.
Stef has found this stackoverflow thread for reference.