Tickets :: Comment on [#15019] IMP creates email with empty to field

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Comment	> When the user provides only bcc recipients, then imp creates a mail > with an empty "to: " header, ie. it adds the header with an empty > header body field. > > Apparently this is not compliant with RFC 4322, which defines the > syntax of the header as follows: > > to = "To:" address-list CRLF > address-list = (address *("," address)) / obs-addr-list > > where the address-list has to contain at least one address. For an > empty to: the mua is supposed to generate a message without to. > > we believe that this issue is currently causing the affected emails > to be rejected by gmx/web.de
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