0020037: Failing to identify the email address in a bounce

ID	Project	Category	View Status	Date Submitted	Last Update

0020037	phpList 3 application	Bounce Management	public	01-08-19 20:01	21-08-19 11:15

Reporter	duncanc
Priority	normal	Severity	minor	Reproducibility	have not tried
Status	resolved	Resolution	fixed
Product Version	3.4.4
Target Version	3.4.5	Fixed in Version	3.4.5

Summary	0020037: Failing to identify the email address in a bounce
Description	The bounce processing identifies the subscriber from the X-ListMember header. If that is not present then it falls back to looking for any email addresses in the bounce body to see whether they are a subscriber's email address. The regex to find email addresses is preg_match_all('/[\S]+@[\S\.]+/', $text, $regs); this looks to be too strict as it expects the email address to be surrounded by white space. Looking at some bounces to see why they were unidentified, they have lines like this, where the email address is surrounded by square brackets 5.1.0 - Unknown address error 550-'5.4.1 [xxx.yyy@spectrumhhi.com]: = which means that the regex matches '[xxx.yyy@spectrumhhi.com]:' which clearly is not a subscriber's email address. Without worrying too much about matching all possible email addresses, a regex that will match only the characters of the email address, ignoring any surrounding brackets or white space is preg_match_all('/[\w\._-]+@[\w\._-]+/', $text, $regs);
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