https://bugs.exim.org/show_bug.cgi?id=2193
Bug ID: 2193
Summary: SRS can create hashes that create invalid MAIL
FROM:-adresses
Product: Exim
Version: 4.89
Hardware: Other
OS: FreeBSD
Status: NEW
Severity: bug
Priority: medium
Component: Experimental
Assignee: nigel@???
Reporter: niels@???
CC: exim-dev@???
The SRS-part of exim uses an old library that includes two base64-tables. One
of those tables has a period as part of it. Therefore it can happen in rare
cases that an SRS-address is created that includes two periods directly one
after another. This is then an e-mail-address that doesn't conform to RFC 5321
(see also RFC 3696) and therefore those mails then get denied by various
mail-servers like those from googlemail.
A user can get then those mails only out after exim creates a new base64-hash
(which appears to happen once a day) for the senders address.
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