Dean Anderson wrote:
The blowback issue is different from this. Blowback happens whenever
anyone _rejects_ emails based on SPF.
Fair enough
A bounce is generated from the relay to the forged sender.
Is it? If the receiving MTA issues an SMTP reject command, it does not assume
any responsibility for the delivery of the mail. It will therefore not
generate a spurious bounce message.
If the sending MTA generates a bounce message, then it's likely not a virus or
other malware likely to forge a sender address.
Matthew.van.Eerde (at) hbinc.com 805.964.4554 x902
Hispanic Business Inc./HireDiversity.com Software Engineer
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