Public bug reported:
If the recipient mail address is too long, local part of VERP sender may
exceed 64 octet, the maximum total length of local-part provided by RFC
5321.
I think it should be checked in Mailman/Hander/SMTPDirect.py and fall
back to original envsender.
e.g. (not tested yet)
--- Mailman/Handlers/SMTPDirect.py.org 2018-06-27 17:19:15.000000000 +0900
+++ Mailman/Handlers/SMTPDirect.py 2020-11-27 22:06:44.047857879 +0900
@@ -338,7 +338,14 @@ def verpdeliver(mlist, msg, msgdata, env
'mailbox': rmailbox,
'host' : DOT.join(rdomain),
}
- envsender = '%s@%s' % ((mm_cfg.VERP_FORMAT % d), DOT.join(bdomain))
+ envlocal = (mm_cfg.VERP_FORMAT % d)
+ if len(envlocal) > 64:
+ syslog('smtp',
+ 'local part of VERP address exceeds 64 octet.'
+ 'fall back to original envsender: %s',
+ envlocal)
+ else:
+ envsender = '%s@%s' % (envlocal, DOT.join(bdomain))
if mlist.personalize == 2:
# When fully personalizing, we want the To address to point to the
# recipient, not to the mailing list
** Affects: mailman
Importance: Undecided
Status: New
** Branch linked: lp:mailman/2.1
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https://bugs.launchpad.net/bugs/1905962
Title:
local-part of VERP sender may exceed 64 octet
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