Equisys technical notes

Technical guidance, explanations and fixes for our products

PRB:Duplicate faxes sent with some SMTP mailers

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ZTN1269

ID: ZTN1269

This Zetafax technical note applies to:

  • Zetafax SMTP Gateway

Symptom

When using an automatic SMTP mailer to generate faxes via the Zetafax SMTP Gateway, two identical faxes are sent, even though only one e-mail was generated.

More Information

This problem occurs when the automatic mailer generates an e-mail with the same e-mail address twice. The utilities known to do this are:

  • Blat
  • Fastmail

If you intercept one of the temporary files generated by the mailer before it reaches the Zetafax SMTP server, you will see the following header

FROM:Hal.Hunter@equisys.com

SUBJECT:Test SMTP E-mail.

TO: 092516074@fax.equisys.com

TO: 092516074@fax.equisys.com

Under these circumstances, the Zetafax Server does not recognise the two addresses as being the same, and therefore dials the number twice.

Status

References

ZTN1418 HOWTO Configure the Zetafax Email Gateway for SMTP

Last updated 04 November 2005 (LD/EB)

Date published 10 January 2003 (ET/SV)

Keywords < SMTP> < Automatic Mailers> < Duplicate faxes>

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