Archive for the tag 'sendmail'

Change SMTP source IP address in sendmail

1. Edit sendmail.cf search for ClientPortOptions

2. Change

#O ClientPortOptions=Family=inet, Address=x.x.x.x

to

O ClientPortOptions=Family=inet, Address=

3. Restart sendmail

4. Verify by sending a mail and checking the full header

CLIENT_OPTIONS(`field1=value1,field2=value2,…’) in sendmail.mc file is equivalent to ClientPortOptions in the sendmail.cf file.

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