Error:

smtp-server: 501 5.1.7 Invalid address
. . . message not sent

Scenario:


mailx receives smtp-server: 501 5.1.7 Invalid address when shell script triggered via crontab job ; no errors received and mail delivered to recipient when same shell script executed on linux prompt.



Cause:


1. Invalid email address or domain name in recipient filled value -c or at the end of line in mailx.

mailx -S smtp=smtp.mes.abc.net -s 'Test Mail' -c j[email protected] t[email protected]

2. Invalid smtp server mentioned in -S clause of mailx

mailx -S smtp=smtp.mes.abc.net -s 'Test Mail' -c j[email protected] t[email protected]

3. Sender's address is wrongly interpreted when mailx is scheduled from crontab shell script job.



Solution:


1. Correct the recipient's email address by verifying its existence in outlook address book.


2. Correct smtp server address which can resolve recipient email address decalred in mailx .


3. Add the sender's email address or alias in mailx -r ; email address which has worked in past when executed from linux prompt ; So that it will not be formed based on cron execution daemon which may not be resolvable by smtp host in many cases.

mailx -S smtp=smtp.mes.abc.net -s 'Test Mail' -r osuser@serv.int -c j[email protected] 

t[email protected]

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