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Home > Archive > IIS and SMTP > February 2006 > 553 Relay restriction ~ HELP Pls, Urgent.
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553 Relay restriction ~ HELP Pls, Urgent.
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| Mooscar 2006-02-17, 10:41 pm |
| Hello,
I got a retuned mail from one of the out going mail.
<553 Relay restriction, by one of following check: SMTP Authorization,
relayres.ini, switches.ini.>
Could anyone tell what is this message mean?
Thanks.
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| Sanford Whiteman 2006-02-17, 10:41 pm |
| > I got a retuned mail from one of the out going mail.
> <553 Relay restriction, by one of following check: SMTP Authorization,
>relayres.ini, switches.ini.>
It means the remote mailserver failed to accept mail for the domain in
question either because (a) you have been deliberately blocked due to
a suspect IP or other SMTP envelope-level factors, or (b) due to
misconfiguration on the remote end (i.e. a published MX that doesn't
"know" it's an MX and does not in fact accept mail for that domain).
--Sandy
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| Sanford Whiteman 2006-02-17, 10:41 pm |
| > I got a retuned mail from one of the out going mail.
> <553 Relay restriction, by one of following check: SMTP Authorization,
>relayres.ini, switches.ini.>
It means the remote mailserver failed to accept mail for the domain in
question either because (a) you have been deliberately blocked due to
a suspect IP or other SMTP envelope-level factors, or (b) due to
misconfiguration on the remote end (i.e. a published MX that doesn't
"know" it's an MX and does not in fact accept mail for that domain).
--Sandy
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